82 ROYAL SOCIETY OF CANADA 
CREPIDULA, Lamarck. 
288. CREPIDULA DORSATA, Broderip, sp. 
Calyptrea dorsata, Brod., Proc. Zool. Soc. London, 1834, p. 38; and Trans. Zool. 
Soc. London, vol. i., p. 202, no. 20, pl. xxviii, fig. 10. 
This species is common in several varieties. 
Sometimes the shell is internally of a rich purple. This form is 
usually found on shells of Ostrea lurida. 
Another variety is white streaked and spotted with brown or somes 
times wholly white. This is found attached to shells and stones dredged 
from deeper water and also occasionally between tides on the under 
sides of rocks, or on dead bivalves, or in the disused burrows of 
Penitella penita. 
289. CREPIDULA ADUNCA, G. B. Sowerby. 
Tankerville Cat., app. vii., no. 828 (1825). 
This is a eommon littoral species. Near Victoria it is generally 
found attached to shells of Æuthria dira and Calliostoma costatum. On 
the west coast Dr. Newcombe found its station to be on Phorcus pulligo, 
while in California, according to Orcutt, it is usually attached to shells 
of Norrisia norrisii. Dr. Dawson found C. adunca in Queen Charlotte 
Sound and at the Queen Charlotte Islands. 
290. CREPIDULA NAVICELLOIDES, Nuttall. 
Common and variable. A large rough form beautifully marked 
inside with green and purple is not uncommon on the rocks at 
Esquimalt. Another form of a pure white, is found under stones be- 
tween tides on all our coasts. A third variety occurs in dead bivalves 
dredged at various depths, and a fourth is in dead Gasteropoda, e.g., 
Calliostoma, Tritonium, and many others, 
AMALTHEA, Schumacher. 
291. AMALTHEA CRANIOIDES, Carpenter, sp. 
Hipponyx cranioides, Cpr., Rept. Brit. Assoc., 1863. p. 654 (August, 1864) ; and Ann. 
Mag. Nat. Hist., series 3, vol. xiv., p. 427 (December, 1864). 
This is a rare shell on the east coast of Vancouver Island but ap- 
“parently more common on the west, as I have seen many dead shells 
brought thence by the Indians. 
Dr, Dawson found one living specimen at the Queen Charlotte 
Islands, and I have myself found it, but only once at Victoria. 
