398 PROCEEDINGS OF THE ACADEMY OF [1896. 



never been described or found since. Reeve mentions that Darwin 

 collected Bulimulus riigulosus on Chatham Island, but this is the 

 only species of Darwin's which I have been able to find in print 

 referred to any particular island. Darwin says in his journal 

 (Chapter XVII), " Of land shells I collected sixteen kinds (and 

 two marked varieties) of Avhich, with the exception of one Helix 

 found at Tahiti, all are peculiar to this archipelago. A single fresh 

 water shell {Paludina) is common to Tahiti and Van Diemen's 

 Land," With the much closer drawn specific lines of the present 

 day, it is probable that both the " Helix " and " Paludlna " would 

 be discriminated as distinct from their allies mentioned by Darwin. 

 A part at least of Darwin's Galapagos shells went into the Cuming- 

 ian collection, but I have been unable to discover any trace of the 

 remainder, which were probably scattered. 



The next recorded expedition to touch at the islands and bring 

 back land shells, was that of Kellett and Wood in 1846. The col- 

 lection was worked up by Professor Edward Forbes, who reports 

 seven species from Chatham Island, namely, Bulhmdus nux, calvus, 

 eschariferus, unijasciatus, and rugulosus already known, and B. 

 clievinitzioides and achatellinus Fbs., which he described as new. 



Subsequently whalers and sealers frequently touched at the islands 

 either for water or other necessaries, and a certain number of land 

 shells reached Europe from the Galapagos Islands without positive 

 data in regard to their origin, and have been described by various 

 authors. Of these Bulimulus asperatus Albers, B. incrassatus Ffr., 

 B. nuciformis Petit, B. amastroides Ancey, and several varieties of 

 riigulosus and eschariferus may be mentioned. 



In later years collections have been made by Dr. Simon Habel in 

 1868, who added one new species {Bidimulus Habeli Stearns) to the 

 fauna of Chatham Island and collected B. chemnitzioides at Chatham, 

 B. Darivini at Bindloe and B. achatellinus at Hood Island. He 

 also collected Atiricula stagnalis Petit, and Pedipes angulatus C. B. 

 Adams at Bindloe ; Melampus trilineatus C. B. Adams, Tralia pan- 

 amensis C. B. Adams, at Hood ; Willia7nia pelfoides Dall and Onchi- 

 della Steindaehneri Semper, all new to the fauna. 



In 1872 the U. S. S. Hassler with the Agassiz party on board, 

 spent ten days among the islands, but no list of the species collected 

 has been published. 



In 1875 Dr. Theodor Wolf, geologist of Ecuador, visited the 

 islands and collected a few land shells subsequently described by P. 



