ON MOLLUSCA OP THE WEST COAST OF NORTH AMERICA. 25? 



No. 



Name. 



Freq. 



Other Localities. 



395 



396 



397 

 398 

 399 

 400 

 401 



402 

 403 



404 

 405 

 406 

 407 



408 

 409 

 410 

 411 

 412 

 413 

 414 

 415 

 416 

 417 



418 



419 

 420 

 421 

 422 



423 



424 



425 



426 

 427 

 428 

 429 

 430 

 431 

 432 

 433 

 434 



Cerithidea ? varicosa, var. Mazatlanica. 

 = Cerithium validum, C. B. Ad. 



Litorinidce. 



Litorina conspersa, Phil. 



-\-L. puncticulata, Phil. 



— L. modesta, Mke. non Phil. 



aspera, Phil. 



Philippii, n. s 



, sp. ind 



fasciata, Gray 



Modulus catenulatus, Phil. 



= M. trochiformis, Eyd. & Soul. 



— , sp. ind 



— disculus, Phil. 



= M. duplicatus, var., A. Ad. 



= M. dorsuosus, Gld. 

 Fossarus tuberosus, n. s 



— angulatus, n. s 



— (Isapis) maculosa, n. s 



? , sp. ind 



Rissoidce. 



Rissoina stricta, Mke 



— , sp. ind 



— Woodwardii, n. s 



Barleeia lirata, n. s.* 



Alvania excurvata, n. s 



effusa, n. s 



tumida, n. s 



, sp. ind 



Cingula, sp. ind 



Hydrobia ulvae, Perm 



— Paludinella staynalis, Midd. 

 , sp. ind , 



Jeffrey siadce. 

 Jeffreysia bifasciata, n. s 



— Alderi, n. s 



— tumens, n. s 



, sp. ind 



Truncatellidce. 

 Truncatella, sp. ind 



Planaxidee. 



Planaxis nigritella, Forbes 



= P. acutus, Mke. 

 -f P. obsoletus, Mke. 



Alaba supralirata, n. s 



Comp. Cinyula tervaricosa, C. B. Ad. 



violacea, n.s 



terebralis, n. s 



alabastrites, n. s 



scalata, n. s 



conica, n. s 



mutans, nom. prov 



laguncula, nom. prov 



sp. ind. (a) 



(«) 



n. u. 



c. 



3 

 v. r. 

 n. u. 



1 

 3 



3 



2 



e. r. 



1 



1 

 2 

 r. 

 9 

 r. 

 1 

 2 

 1 

 1 

 4 



90 

 3 



13 

 2 



50 



Guayaquil, Panama. 



Real Llejos, Panama. 



Sitka, Mexico, S. Salvador,Pan. 



Tumbez, Panama. 

 Taboga, S. America. 



Acapulco. 



Europe, Caspian, United StateSj 

 Ochotsk Sea. 



San Juan. 



Jamaica. 



* The absence of typical Rissoce among so many species of small shells is deserving of 

 notice. 



1856. s 



