Pallas travelled throughout the Dutch Republic and to London, improving his medical and surgical knowledge. He then settled at The Hague, and his new system of animal classification was praised by Georges Cuvier[citation needed]. Pallas wrote Miscellanea Zoologica (1766), which included descriptions of several vertebrates new to science which he had discovered in the Dutch museum collections. A planned voyage to Southern Africa and the East Indies fell through when his father recalled him to Berlin. There, he began work on his Spicilegia Zoologica (1767–1780).
Title of the book Travels through the southern Provinces of the Russian Empire, in the years 1793 and 1794
Pallas settled in St Petersburg, becoming a favourite of Catherine II and teaching natural history to the Grand Dukes Alexander and Constantine. He was provided with the plants collected by other naturalists to compile the Flora Rossica (1784–1815), a Russian flora, and started work on his Zoographica Rosso-Asiatica (1811–31), a zoography of Russia and Asia. He also published an account of Johann Anton Güldenstädt's travels in the Caucasus. The Empress bought Pallas's large natural history collection for 2,000 rubles, 500 more than his asking price, and allowed him to keep them for life. During this period, Pallas helped plan the Mulovsky expedition, which was cancelled in October 1787.
Between 1793 and 1794, Pallas led a second expedition to southern Russia, visiting the Crimea and the Black Sea. He was accompanied by his daughter (by his first wife who had died in 1782) and his new wife, an artist, servants, and a military escort. In February 1793, they travelled to Saratov and then downriver to Tsaritsyn. They explored the country to the east, and in August travelled along the banks of the Caspian Sea and into the Caucasus Mountains. In September, they travelled to the Crimea, wintering in Simferopol. Pallas spent early 1794 exploring to the southeast, and in July travelled up the valley of the Dnieper, arriving back in St Petersburg in September. Pallas gave his account of the journey in his P. S. Pallas Bemerkungen auf einer Reise in die Südlichen Statthalterschaften des Russischen Reichs (1799–1801). Catherine II gave him a large estate at Simferopol, where Pallas lived until the death of his second wife in 1810. He was then granted permission to leave Russia by Emperor Alexander, and returned to Berlin, where he died in the following year. His grave is preserved in the ProtestantFriedhof I der Jerusalems- und Neuen Kirchengemeinde (Cemetery No. I of the congregations of Jerusalem's Church and New Church) in Berlin-Kreuzberg, south of Hallesches Tor.
Headstone of Peter Simon Pallas in the Berlin-Kreuzberg cemetery
In 1772, Pallas was shown a 680-kg lump of metal that had been found near Krasnoyarsk. Pallas arranged for it to be transported to St Petersburg. Subsequent analysis of the metal showed it to be a new type of stony-iron meteorite. This new type of meteorite was called pallasite after him; the meteorite itself is named Krasnojarsk or sometimes Pallas Iron (the name given to it by Ernst Chladni in 1794).
Anasteroid is named after him: 21087 Petsimpallas. A Belgian astronomer, Eric Elst chose the name "Sarapul 26851" for an asteroid because in Pallas's writings, he mentioned his liking of the city of Sarapul, Russia.
Spicilegia zoologica, 1774Cyanopica cyanus by Peter Simon Pallas
Dissertatio inauguralis de infestis viventibus infra viventia (Leiden: Lugduni Batavorum, 1760).
Elenchus zoophytorum, sistens generum adumbrationes generaliores et specierum cognitarum succinctas descriptiones, cum selectis auctorum synonymis (The Hague: van Cleef, 1766).
Lyst der Plant-Dieren, bevattende de algemeene schetzen der geslachten en korte beschryvingen der bekende zoorten (Utrecht: van Paddenburg & van Schoonhoven, 1768).
De ossibus Sibiriae fossilibus, craniis praesertim Rhinocerotum atque Buffalorum, observationes (Novi Commentarii Academiae Scientiarum Imperialis Petropolitanae, XIII, Saint Petersburg, 1768).
Dierkundig mengelwerk, in het welke de nieuwe of nog duistere zoorten van dieren, door naauwkeurige afbeeldingen, beschryvingen en verhandelingen opgehelderd worden (Utrecht: van Paddenburg & van Schoonhoven, 1770).
Reise durch verschiedene Provinzen des Russischen Reichs (Saint Petersburg, 1771–1801).
Puteshestviye po raznym provintsiyam Rossiyskogo gosudarstva (Saint Petersburg, 1773–1788).
Flora Rossica (Saint Petersburg, 1774–1788, in 2 parts).
Sammlungen historischer Nachrichten über die mongolischen Völkerschaften. St. Petersburg, Frankfurt, Leipzig 1776–1801.
Observations sur la formation des montagnes et sur les changements arrivés au Globe, particulièrement à l'Empire de Russie (Acta Academiae Scientiarum Imperialis Petropolitanae, Saint Petersburg, 1777).
Novae species Quadrupedum e Glirium ordine (Erlangen, 1778).
Mémoires sur la variation des animaux (Acta Academiae Scientiarum Imperialis Petropolitanae, Saint Petersburg, 1780).
Katalog rasteniyam, nakhodyashchimsya v Moskve v sadu yego prevoskhoditel'stva deystvitel'snogo statskogo sovetnika i Imperatorskogo Vopitatel'nogo doma znamenitogo blagodetelya, Prokofiya Akinfiyevich Demidova, sochinyonnyy P. S. Pallasom, adademikom sankt-peterburgskim (Saint Petersburg, 1781).
Opisaniye rasteniy Rossiyskogo gosudarstva, s ikh izobrazheniyami (Saint Petersburg, 1786).
Sravnitel'nyye slovari vsekh yazykov i narechiy, sobrannyye desnitsey Vsevysochayshey osoby imperatritsy Yekateriny II (Saint Petersburg, 1787–1789, in 2 volumes).
Tableau physique et topographique de la Tauride (Nova Acta Academiae Scientiarum Imperialis Petropolitanae, X, Saint Petersburg, 1792).
Kratkoye fizicheskoye i topograficheskoye opisaniye Tavricheskoy oblasti (Saint Petersburg, 1795).
Bemerkungen auf einer Reise in die südlichen Statthalterschaften des Rußischen Reichs in den Jahren 1793 und 1794 (Leipzig, 1799–1801)
Species Astragalorum descriptae et iconibus coloratis illustratae (Leipzig, 1800).
^ abBeolens, Bo; Watkins, Michael; Grayson, Michael (2011). The Eponym Dictionary of Reptiles. Baltimore: Johns Hopkins University Press. xiii + 296 pp. ISBN978-1-4214-0135-5. ("Pallas", p. 199).
