132 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL.2 



Guppya fultoni Gude, Proc. Malacol. Soc. London, vol. 5, no. 4, April, 

 1903, p. 265, pi. 7, figs. 18, 19, 20. "Cocos Island, Pacific 



Ocean." Biolley, Mollusques de L'lsla del Coco. Mus. Nac. 



de Costa Rica, 1907, p. 14. Cocos Island. 



Pfeififer's description of pacifica fits almost exactly the large series 

 of shells which we have available. The same is true of the figure repro- 

 duced by Tryon. One of our sets was collected by the 1905-1906 Expe- 

 dition of the Academy (19 specimens); these passed through Dall's 

 hands and were identified as Guppya hopkinsi by him. They may there- 

 fore be considered as authentic. In all of the specimens there is a definite 

 tendency toward angulation of the body whorl at the periphery, a fea- 

 ture not shown in Dall's drawings, which may have been made from 

 a senile specimen. Numerous specimens were taken by Hertlein and 

 Howell of the Hancock and Templeton Crocker Expeditions, respec- 

 tively, on leaves and mosses along the creeks draining into Wafer and 

 Chatham bays. 



According to a note by Dall (published by Biolley, 1907, p. 15) 

 he agreed with von Martens that the keeled and smooth forms are not 

 more than varietally distinct. Under the circumstances and in view of 

 insular conditions in general, we do not believe that there are sufficient 

 differences in the series of available Guppya from Cocos Island to war- 

 rant the recognition of more than one name. 



Auricula stagnalis d'Orbigny 



Auricula stagnalis d'Orbigny, Mag. de Zool 1835, p. 23. 



d'Orbigny, Voy. Amer. Merid., Moll., vol. 5, 1837, p. 325, pi. 



42, figs. 7 and 8. Guayaquil, Ecuador. Reeve, Conch. Icon., 



vol. 20, 1878 (on title page), Auricula, sp. 3, pi. 2, fig. 3. "Hab. 



S. America." Dall, Proc. Acad. Nat. Sci. Philadelphia, 



vol. 48, 1896, p. 452. Earlier records cited. von Martens, 



Sitz. Ges. Naturf. Freunde zu Berlin, Jahrg. 1902, no. 3, p. 62. 



Cocos Island. Biolley, Mollusques de L'lsla del Coco. 



Mus. Nac. de Costa Rica, 1907, p. 19 (as Auricula (?) stag- 

 nalis Orb.) "En colonies nombreuses contre troncs d'arbres 

 morts a demi submerges dans le lit de I'Arroyo del Genio, a 

 peu de distance de son embouchure dans le Baie de Wafer." 



Dall and Ochsner, Proc. Calif. Acad. Sci., sen 4, vol. 



17, no. 5, 1928, p. 178. Galapagos Islands, various localities. 



