54 ROYAL SOCIETY OF CANADA 
NETTASTOMELLA, Carpenter. 
120. NETTASTOMELLA DARWINNII, Sowerby, sp. 
Pholas Darwinii, Sby. 
One specimen was obtained at Vancouver Island by Mr. Lord. The 
species was originally described as from Chili. It has since been found 
at Monterey (Rich) and San Diego (Cooper) teste Carpenter. 
PENITELLA. Conrad. 
121. PENITELLA PENITA, Conrad, sp. 
Pholas penita, Conr., Jour. Acad. Nat. Sci. Phila., vol. vii., pt. 2, p. 237, pl. xviii, fig. 
7 (1837). 
Common all round the coast of Vancouver Island, perforating soft 
rocks between tides. At Vesuvius Bay, Salt Spring Island, I have found 
very fine specimens measuring more than 35 inches in length and nearly 
6 inches in circumference at the umbones. This species is said by Dall ' 
to be found at Bering Island with Saxicava rugosa “living in large 
masses of Melobesia, which form accumulations almost like coral on the 
exposed coasts.” 
122, PENITELLA OVOIDEA, Gould, sp. 
Pholas ovoidea, Gould, Proc. Bost. Soc. Nat. Hist., vol. iv., p. 87 (Nov., 1851). 
I am not sure that I know this species. It was described from 
Monterey, and Carpenter in his “Supplementary Report” gives it a 
southern range. Specimens that I have received from California under 
this name are indistinguishable from P. penita. Mr. Whiteaves in his 
account of Mr, Richardson’s collections says that he collected four living 
specimens of P. penita and four of P. ovoidea, near Victoria in 1875. He 
further says that penita has “ Siphonal tube wrinkled but not tubercu- 
lated” while ovoidea has *Siphonal tube tuberculated externally, espec- 
ially near the middle.” 
Through the kindness of Mr. Whiteaves one of Richardson’s speci- 
mens is in my cabinet, but though it manifestly differs from typical 
penita it does not to my mind accord sufficiently well with Gould's des- 
cription of ovoidea. 


'** Report on the Mollusca of the Commander Islands and Bering Sea, collected 
by Leonhard Stejneger in 1882-3.” Proc. U.S. Nat. Mus., vol. vii. (1884), p. 348-349. 
In the same locality with P. penita were found : Mytilusedulis, Modiola modiola, 
Cardium blandum, Serripes Groenlandicus, Tapes staminea, Macoma Midden- 
dort, Mactra falcata, Siliqua patula, Saxicava rugosa, Pholas crispata, Buccinum 
Merchianum, Chrysodomus liratus, Purpura lima, Littorina sitkana, Lacuna 
vincta, Acmea pelta, Margarita helicina, and Cryptochiton Stelleri. 
