ON MOLLUSCA OF THE WEST COAST OF NORTH AMERICA. 359 



previous results have been tabulated, the materials have not been made 

 public. Mr. Cuming prepared a list of 90 sea shells for Mr. Darwin's use, 

 but it has been mislaid ; nor can Mr. Darwin furnish any additional infor- 

 mation, having unfortunately distributed his valuable collections before they 

 were geographically tabulated. The following list has been constructed from 

 one most kindly drawn out for this Report by Mr. Cuming, with as much 

 completeness as his extremely limited time allowed ; with the addition of 

 species tabulated in the Monographs, and a few from the Pandora Voyage. 

 It is probable that some species have been overlooked from " Hood's Island," 

 which appears both in the Galapagos group and in the central Pacific : both 

 of them are quoted in the Monographs as " Lord Hood's Island," and they 

 are very rarely distinguished from each other. 



List of Galapagos Shells. 



In this table, stations in America are marked in columns to the left ; M. Mazatlan and 

 G. the Gulf; C. A. Central America ; P. Panama ; and S. A. South America; while Pacific 

 stations are recorded to the right. 



American Localities. 



No. 



Species. 



Station. 



Pacific Localities. 



(M.) 

 M, 



M. 



?M. 



C.A. 



P. 

 P. 



S.A. 

 S.A. 



1 



2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 



10 

 10£ 

 11 

 12 

 13 

 14 

 15 

 16 

 17 

 a 

 b 

 c 

 d 

 e 

 f 

 9 

 h 

 i 

 k 

 I 



m 

 n 







P 

 Q 

 r 

 s 

 t 



18 



19 



Gastrochsena rugulosa, Sow. "1 





Society Islands. 



Pearl Island. 

 Society Islands. 



Sandw.I. {Darwin). 



hyalina, Sow [ 



Petricola amygdalina, Sow... J 



In Aviculce, 3-7 fin. 



reefs & rocks. 



fine sand, 6 fm. 



Aviculce, 1. w.-7. 

 on Aviculde. 



stones & Aviculae. 

 coral sand, 6-1 7 fm. 



on Aviculce. 



on bushes, 

 under lava. 



on lava. 



dry grass. 



under scoriae. 



under scoriae. 



punctata, Sow. 



Cardita varia, Brod 



incrassata. 



Chama imbricata, Brod 



Janus, Rve.* 



Modiola capax, Conr. [?]. 

 Crenella coarctata, Dkr. 



Byssoarca truncata, Sow 



Pecten magnificus, Sow 



Lima arcuata*. 



Anomia adamas, Gray 



Bulla Quoyi, Gray. 



rufolabris, A. Ad. 



Bulimus nux, Brod. 



verrucosus, Pfr. 



unifasciatus, Sow 



rugulosus, Sow. 



Eschariferus, Sow. 



Darwinii, Pfr. 



Achatinellinus, Forbes. 



incrassatus, Pfr. 



ustulatus, Sow. 



calvus, Sow 



Jacobi, Sow 



Chemnitzioides, Forbes. 



corneus, Sow. 



sculpturatus, Pfr. 



nucula, Pfr. 



Galapaganus, Pfr. 



Manini, Pfr. 



Siphonaria gigas, Sow. 

 scutellum. 





* Chama spinosa (M., C. A.) and Lima Pacifica (C. A., P., S. A.), are also quoted from 

 ' Lord Hood's Island," and are probably Galapagian species. 



