PANAMIC-PACIFIC PELECYPODA 



S5 



the literature which seem acceptable. Only the shell-bearing types of mol- 

 lusks are included in this analysis. 



Total number^ of species of moUusks known at the present time along 

 the coast of Peru southward to the Island of Chiloe, Chile. 



Gastropods .„ 

 Pelecypods ... 

 Scaphopods 

 Chitons 



— 274 species 

 — 248 species 



2 species 



45 species 



Total 



,.569 species 



This total of 569 species may be broken down as follows: 



Species found in northwestern Peru (largely Panamic-Pacific and Paita 



Buffer species) which do not range south of Punta Aguja, and of these 



the majority of which do not pass Cabo Blanco. 



Gastropods 

 Pelecypods 

 Scaphopods 

 Chitons 



.121 species 



.178 species 



2 species 



2 species 



Total 



303 species 



Panamic-Pacific and Paita Buffer species ranging south of Punta Aguja. 



Gastropods 



Pelecypods 



Chitons 



,....57 species 

 „...32 species 

 ..„ 5 species 



Total ...94 species 



Species restricted to the Peruvian Province as a whole. 



Gastropod s — 1 61 species 



Pelecypods 80 species 



Chitons 45 species 



Total 292 species 



Species known only from Peru. 



Gastropods 133 species 



Pelecypods „ ~ 60 species 



Chitons „ 26 species 



Total 



.219 species 



3 The above compilation is the best possible at the present time. Additions to the 

 mollusks of northwestern Peru may be expected as the families of some small gastro- 

 pods are worked up, of which good collections are at hand. 



