NO. 8 HANNA AND HERTLEIN : MOLLUSCA 131 



that this tropical species has probably the widest geographic range of 

 any land snail. We have two specimens from Cocos Island, one taken 

 by the Hancock Expedition along the creek draining into Wafer Bay 

 and the other by the Expedition of the California Academy of Sciences 

 in 1906 without restricted locality. It must be abundant at favorable 

 places on the Galapagos Islands because the 1906 Expedition obtained 

 a very large series on Charles Island. 



According to von Martens (1902, p. 61) this species was found by 

 Biolley only at Wafer Bay near the settlement where it occurred upon 

 palm leaves and banana leaves, and may have been recently introduced 

 on the Island. 



Guppya pacifica (Pfeififer) 



Helix pacifica Pfeiffer, Symb. ad Hist. Helic, sect. 3, 1846, p. 66. 



Cocos Island. Pfeiffer in Martini and Chemnitz, Conch.- 



Cab., Ed. 2, vol. 1, abt. 12, Helix, no. 549, pi. 88, figs. 3-5. 



Cocos Island. Pfeiffer, Monogr. Helic. Viv., vol. 1, 1847, 



p. 52. Cocos Island. Reeve, Conch. Icon., vol. 7, Helix, 



1852, pi. 112, fig. 640. Cocos Island. Tryon, Manual 



Conch., ser. 2, vol. 3, 1887, p. 78, pi. 14, fig. 28. Cocos Island. 



Nanina (Nigritella) pacifica (Pfeiffer), Clessin Ed., Nom. Helic. Viv., 

 1878-1881, p. 80. Cocos Island. 



Guppya pacifica (Pfeiffer), Ancey, Journ. de Conchyl., vol. 51, no. 2, 



1903, p. 101. Cocos Island. Biolley, Mollusques de L'lsla 



del Coco. Mus. Nac. de Costa Rica, 1907, p. 14. Cocos Island. 



Conulus sp., von Martens, Sitz. Ges. Naturf. Freunde zu Berlin, 



Jahrg. 1898, no. 9, p. 156. Cocos-Insel. Dall, Proc. Acad. 



Nat. Sci. Philadelphia, vol. 52, 1900, p. 96. 



Guppya pacifica var. conulus von Martens, Sitz. Ges. Naturf. Freunde 

 zu Berlin, Jahrg. 1902, no. 3, p. 59. Cocos Island. 



Guppya hopkinsii Dall, Proc. Acad. Nat. Sci. Philadelphia, vol. 52, 

 April 16, 1900, p. 97, pi. 8, figs. 5 and 6; Pilsbry, p. 105, 4 

 text figs. "Cocos Island, on leaves. Heller and Snodgrass." 



Guppya hopkinsi Dall, von Martens, Biol. Centrali-Americana, Moll., 

 1901, p. 620. Cocos Island. 



