ON MOLLUSCA OF THE WEST COAST OP NORTH AMERICA. 249 



Freq. 



Other Localities. 



174 

 175 

 176 



1764 

 176c 



177 



178 

 179 



Lithophagus calyculatus, n. s. 



plumula, Hani. 



aristatus, Sol. 



=Modiola caudigera, Lam. 



= Mytilus ropan, Desh. 



, var. gracilior .... 



, var. tumidior 



cinnamomeus, Chemn. ., 



Leiosolenus spatiosus, n. s 



-, sp. ind 



180 

 181 

 182 



183 

 184 



185 



186 

 187 

 188 

 689 

 189 

 190 



191 

 192 

 193 



194 



195 

 196 



197 



198 

 199 



200 

 201 

 202 

 203 



204 



205 



Areadce. 

 Area grandis, Brod. Sf Sow 



— multicostata, Sow 



— Plabiata, Sow 



'i=A. labiosa, Sow. 



'i=A. incongrua, Say. 



— bifrons, n.s 



— tuberculosa, Sow 



-\-A. trapezia, Desh. 



■\-A. similis, C. B. Ad. 



— reversa, Grag , 



= A. hemicardium, Koch. 



— Pbrevifrons, Sow 



— emarginata, Sow , 



, sp. ind. (a) 



„ -. (*) 



Byssoarca Pacifica, Soiu 



mutabilis, Sow 



Con\\\, Area Americana, D'Oib. = imbricata, 

 Brug. 



fusca, Brug 



vespertilio, n. s 



illota, Sow 



Comp. A. Tabogensis, C. B. Ad, 



gradata, Brod. &{ Sow 



}=A.sguamosa,La.m.=A.Domingensis, Lam, 



=Arca clathrata, Defr. 

 Comp. B. divaricata, Sow. 

 Comp. B.pusilla, Sow. 

 Comp. A. donaciformis, Rve. 



— solida. Sow 



Pectunculus ineequalis, Sow. (non Gray) 



= P. pectiniformis, Wood (non Lam.) 

 ?+P. assimilis, Sow. 

 = — ? multicostatus, Sow 



Nuculidce. 



Nucula exigua, Sow 



Leda Elenensis, Sow 



AviculidcB. 

 Pinna maura, Sow 



- lanceolata, Sow 



- .'rugosa, Sow 



Avicula sterna, Gld. 



= A. Atlantica, Mke. 

 Margaritiphora Mazatlanica, Hani, 



= A. fimbriata, Dkr. 

 Isognomon Chemnitzianum,2)'Or5. 



= Pernaflexuosa, Sow. 



V. r. 

 e. r. 



6. r. 

 1 



V. c. 

 2 

 2 



e. r. 

 V. c. 



1 



e. r. 

 2 

 1 



1 



1 



e. r. 



V. r. 



n. u. 

 3 



com. 



11. u. 



v.r. 

 n. u. 



V. r. 



n. u. 



Panama. 



Senegal, West Indies. 



Mauritius, Philippines, Cuba, 

 Venezuela, Central America. 



Pan., Real Llejos, Bay Guayaq. 



Gulf Tehuantepec. 



Real Llejos, Tumbez, W. Indies. 



Panama, Real Llejos. 



Panama, Tumbez, 



Tumbez. 



Atacamas, Rl.Llej.,Xipix.,Pan, 



Sj;. Elena, Bijooga Island. 

 Island of Plata, Panama. 



East and West Indies, 



Gulf Nicoya. 



St. Elena, Taboga, West Indies, 

 and Fossil, 



Panama, Payta. 

 Panama, Real Llejos, Puerto 

 Portrero, Guayaquil, 



Ecuador, Guayaquil, 



Panama, Bay of Caraccas, 

 Panama, St. Elena, 



Panama. 

 Puerto Portrero. 

 Panama. 

 Panama. 



Panama, W. Indies, Conchagua. 



