ZOOLOGY. 379 



Family B U L L I D iE . 

 BULLA NEBULOSA. 



Bulla tiebulosa, Godld, Sowehby, Thes. f. 79,80. 

 Hab. —B:iy of San Pedro; Dr. Trask. 



BULLA TENELLA. 



Bulla tenella, Adams, Sowebbt, Thes. pi. 134, f. lOi. 

 Bah. — Puget Sound; Dr. Suckley. 



The habitat of Adams's shell is not known. A specimen from Puget Sound agrees very well 

 with Sowerby's figure and description quoted above. 



Family OSTREIDtE. 

 OSTREA EDULIS? 



Ostrta edulis 7 Linn, Lam. 

 Hab — Shoalwater bay, Wash. Terr.; Dr. Cooper. Straits of Fura and Puget Sound; Mr. Gibbs. 



Mr. Carpenter is of opinion that this is a distinct species, and on comparison with European 

 specimens it does show differences. 



" O^'sters are rare on most parts of the northwest coast, but there are a few localities in 

 which they are found in abundance. One of these is Shoalwater baj', a little to the north of 

 tte mouth of Columbia river, where are to be found the conditions requisite for their existence 

 and multiplication. The markets of San Francisco and all the coast southward are supplied 

 from this baj-. The oysters obtained here appear to differ little, if at, all, from the common 

 oj'ster of Europe, and jdosscss the same peculiar coppery flavor remarked in the European mol- 

 lusc when eaten for the first time. 



"In Puget Sound small oysters are found near the mouth of the Nisqually river, and some 

 others, but nowhere large enough to bo of much value. They are said to grow larger at Van- 

 couver island, and very large ones have lately been discovered near the mouth of Hood's 

 CanaL"— C. 



ANOMIA MACROSCHISMA. 



AHotnia macroschisma, Desh. Rev. Zool. 369. Mag. Zool. PI. 34. — MiDu. Beit, iii, 6, Idem Eoise, p. 242, PI. XIX, fig. 



1-5. 

 Placunanomia macroschisma, Carpenter, Rep. p. 312. 

 Ilah. — Straits of Juan de Fuca; G. Gibbs, esq Nootka sound; C. J. W. Russell. 



Several very perfect specimens were collected at the Straits of Fuca, and sent to tlie Smith- 

 sonian Institution by Mr. Gibbs. 



PECTEN CAURINUS. 



I'ecten caurinus, Gould, Proceed. Best. Soc. iii., p. 346. Exped. Shells, 95. U. S. Exploring Exped. Mull, and Sbells, 

 p. 458. Atlas, fig. 569. — Carpenter, Rep. p. 311. 

 //at.— Straits of Fuca; Dr. Suckley, G. Gibbs, e.'^q. Port Townsend, Admiralty inlet, Oregon; Gould. 



This fine pecten is found of a much larger size than that described by Dr. Gould. Of ten 

 specimens collected by Mr. Gibbs and sent to the Smithsonian institution, one measures twenty- 

 three inches in circumference, with a diameter of nearly eight inches, and some others are 

 nearly as large. 



