54 ROYAL SOCIETY OF CANADA 



NETT ASTO MEI.L A , Carpen ter. 

 120. >»'ettast(»mella Darwinnii, Sowerby, sp. 

 Pholas Darivinii, Shy. 



One specimen was; obtained at Vancouver Island by Mr. Loi'd. The 

 species Avas originally described as from Chili. It has since l)een found 

 at Monterey (Eieh) and San Diego (Cooper) teste r'arpenter. 



PENITELLA. Conrad. 



121. J*KNITELLA PENITA. Courad, S}). 



Pholas j)i'»ifK, Ci)ur., .Jouf. Acad. \at. 8ci. Pliila., vol. vii., pt. '1. p. 'I'M, \)\. xviii. tig. 



7 ami). 



Common all round the coast of Vancouver Island, perforating soft 

 rocks between tides. At Vesuvius Bay. Salt Spring Island, I have found 

 very tine specimens measuring more than 3^ inches in length and nearlj^ 

 6 inches in circumference at the umbones. This species is said by Dall ' 

 to be found at Bering Island with Saxirava rugosa '' living in large 

 masses of Melobesia, which form accumulations almost like coral on the 

 exposed coasts.'" 



122. Penitella ovoidea, Gould, sj). 



P/io/as ovoidea, (Tould, Proc. Bost. Soc. Nat. Hist., vol. iv., p. S? (Nov., l.S.ol). 



I am not sure that I know this species. It was described from 

 Monterey, and Carpenter in his •' Supplementary Report '" gives it a 

 southern i-ange. Specimens that I have received from California under 

 this name are indistinguishable from P. penita. Mr. Whiteaves in his 

 account of Mr. Richardsons collections says that he collected four living 

 specimens of P. penita awA four of P. ovoidea, near Victoria in 1875. He 

 further saj's tluxt penita has '• Siphonal tube wrinkled but not tubercu- 

 hited'' whWe ovoidea hn>i • Siphonal tube tul)e]-culated externally, espec- 

 ially near the middle."' 



Through the kindness of Mr. Whiteaves one of Richai-dson's speci- 

 mens is in my cabinet, but though it manifestly ditfers from typical 

 penita it does not to my mind accord sufficient!}- well with Gould's des- 

 cription of oi'oidea. 



' " Report on the Mollusca of the Commander Islands and Bering Sea, collected 

 !)>• Leonhard Stejneger in 1882-:i." Proc. V. S. Nat. Mus., vol. vii. (18H4), ji. :-i48-:M9. 



In tlu'.'ianie locality with P. penita were fonnd : Mjitihisednlis, Modiola inodiola, 

 Cavdiuni blatuhoti, ,'^erri])rs (ivooilarif/ieii.s. Tapes sfaiiiiiiea, Maeotna Midden- 

 'lorfH, Mactva falcafa, Siliqiia patula,Sa.eivava rni/osa, Pholas erispafa, B iiecimnti 

 Mierchiannni, Chri/.sodoiiins liratus. Pnrjiuva lima, Littorina sitkana. Laonia 

 viticta, Acmtea pelta, Mariiavifa heliciiia, and Cvyptocliiton Sfelleri. 



