374 ZOOLOGY. 



Family MELANIAD^.- 

 MELANIA PLICIFERA. 



Mdania plicifera, Lea, on fiesh water and land shells in Trans. Phil. Soc. of Phil., pi. xxiii, f. 90. — Caepenter's 

 Report, p. 325. 

 Ilab. — Very common in rivers of Washington Territory. — J. G. C. 



MELANIA SILICULA. 



Mdania silicula, Gould, Proceed. Bost. Soc. II, p. 22i, 1847 ; ExpeJ. Shells, 46. Carp. Rep., p. 325.— Idem, Expl. 

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

 I/ab. — Rivers of Washington Territory, Dr. Cooper ; Nisqually and Oregon, Dr. Gould. 



MELANIA SHORTAENSIS. 



Mdania Shortaetisis, Lea, in Uteris. 

 //aJ.— Willopah river, Dr. Cooper. 



AMNICOLA NUTTALLIANA. 



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

 Uab. —Columbia river, Dr. Cooper. 



AMNICOLA SEMINALIS. 



Paludina semina/is, Hinds, Zool. Sulph. p 59, pi. 16, f. 22. 

 Bithinia seminalis, Cakp. Rep. p. 326. 

 Ifab. — Upper California, Dr. Trask. 



Family TU R RITELLID ^■ 



TURRITELLA ESCHRICHTIL 



Turritella eschTichlii, Middend. Beitrage, II, p. 68, pi. xi. f. 1 ; Carp. Rep. 325. 

 llfib. — I'uget Sound, Dr. Sucldey, G. Gibbs, esq.; Arctic Sea, Mlddendorfi'. 



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 LIT TO R INID iE . 

 LITTORINA RUDIS. 



Litlorinarudis, Goild, Stimpson, Shells of New England. 

 Liltorina Barclayan ? Hinds. 

 Ilab. — 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. 



Littorina scutulata, GouiD, Proceed. Bost. Soc. Ill, p. 83, March, 1849, Exped. Shells, p. 83. — Ideii, U. S. Expl. 

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

 Ilab. — 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 

 of L. rudis. — J. G. C. 



LITTORINA PLANAXIS. 



Littorina pZanaits, Nurr. Sup. PniLirp. Abbaldingen T. II, p. 201; Litt. Pt. IV, p. 16. Carp. Report, p. 326. 

 Z/aJ. —San Luis Obispo, Dr. iutisell. 



