82 ROYAL SOCIETY OF CANADA 



CEEPIDULA, Lamarck. 



288. Crepidula dorsata, Broderip, sp. 



Calyptroia dorsata, Brod., Proc. Zool. Soc. London, 18;34, p. 38; and Trans. Zool. 

 Soc. London, vol. i., p. 202, no. 20, pi. 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 some- 

 times M^holly 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 (182.5). 



This is a common littoral species. Near Victoria it is generally 

 found attached to shells of Euthria 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 navicellgides, Nuttall. 



Common and variable. A large rough form beautifully marked 

 inside with green and j)urple is not vmcomraon on the I'ocks 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. 



Dt. Dawson found one living specimen at the Queen Charlotte 

 Islands, and I have myself found it, but only once at Victoria. 



