374 ZOOLOGY. 



Family MELANIAD^. 

 MELANIA PLICIFERA. 



Ifdania plicifera, Lea, on frcBh water and land shells in Trans. Phil. Soc. of Phil., pi. xxiii, f. 90. — Caepentek's 

 Report, p. 325. 

 JSib, — Vei7 common in rivers of Washington Territory. — J. G. C. 



MELANIA SILICULA. 



Mdania sUicula, Gould, Proceed. Bost. Soc. II, p. 224, 1847 ; Exped. Shells, 46. Carp. Eep., p. 325. — Idem, Expl. 

 Exped. Shells, p. 141, fig. 164. 

 Bab. — Elvers of Washington Territory, Dr. Cooper; Nisqually and Oregon, Dr. Gould. 



MELANIA SHORTAENSIS. 



Melania sfwrtaensis, Lea, in Uteris. 

 Hdb. — Willopah river. Dr. Cooper. 



AMNICOLA NUTTALLIANA. 



Paludina NutlaUiana, Lea, in Philos. Trans, pi. xxvi, f. 89. 

 Hab. — Columbia river. Dr. Cooper. 



AMNICOLA SEMINALIS. 



Paludina seminalia, Hinds, Zool. Sulph. p. 59, pi. 16, f. 22. 

 Bithinia seminalis, Cakp. Eep. p. 326. 

 Sab. — Upper California, Dr. Trask. 



Family TURRITELLID Jl. 

 TURRITELLA ESCHRICHTIL 



TuTritdla eschrichtii, Middend. Beitrage, II, p. 68, pi. xi, f. 1 ; Carp. Rep. 325. 

 Eai. — Puget Sound, Dr. Suckley, G. Gibbs, esq. ; Arctic Sea, Middendorff. 



A few specimens sent from Puget Sound agree in all respects with the figure and description 

 given of this species by Middendorff, as cited above. 



Family LITTORINIDiE . 

 LITTORINA RUDIS. 



LiUorina rtidis, Gould, Stimpson, Shells of New England. 

 Littorina Barclayan ? Hinds. 

 iZaft.^Shoalwater bay to Straits of Fuca, Dr. Cooper, Dr. Suckley, G. Gibbs, esq. 



Very abundant on the northwest coast, where it presents the same varied appearances as our 

 eastern shell. 



LITTORINA SCUTULATA. 



IMorina scutulata, Gould, Proceed. Bost. Soc. Ill, p. 83, March, 1849, Exped. Shells, p. 83. — Idem, U. S. Expl- 

 Exped. Moll. & Shells, p. 200, fig. 241.— Cabp. Rep. p. 326. 

 Hob. — Puget Sound, Dr. Cooper ; Puget Sound, Oregon, Dr. Pickering. 



On rocks from the head of Puget Sound to the Straits of Fuca, having habits similar to those 

 ofi. rudi.s.—J. G. C. 



LITTORINA PLANAXIS. 



Littorina planaxis, Nutt. Sup. Puilipp. Abbildungen T. II, p. 201 ; Litt. Pt. IV, p. 16. Carp. Report, p. 326. 

 Hab. — San Luis Obispo, Dr. Antisell. 



