shore: fishes of galapagos islands 



339 



Hefaius aliala. R, CI, C. 



Canthidcr^nis angidosus. C. 



Cantherines sandzuichensis. R. 



Osbeckia scri^ia. R. 



Ostracion Icntiginosum. C, G. 



Chihmyctcrus affinis. G. 



Of these i8 species on\y Galeocerdo ttgrmum^ Osbeckia serif ta 

 and Chilomycterus affinis are known from the American main- 

 land coast. 



There is a small number of species that are peculiar to the 

 islands as a group, i. c, that occur at 2 or more of them but 

 are not known elsewhere. These are : 



Atnia atradorsata. C, G. 



Ltttianus viridis. R, C, G (Tres Marias Ids.) 



Pomacentrus leucortis. R, C, G. 



Poniacentriis ai'cifrons. C, G. 



I chthy callus nicholsi. R, G. 



Melichthys bisfinostis. R, C. 



Xesurus laticlavitis. R, C, G. 



These may be termed Eastern Pacific Insular species. Two 

 of them, Po7nacenirus leucorus and Xesurus laticlavius, may 

 be regarded as diagnostic of the islands as a group. They are 

 known from all the islands except CHpperton, but the Clipperton 

 fishes are too little known to be here considered. Ltttianus 

 viridis^ although occurring at all the islands, is known also from 

 the Tres Marias Islands near the coast of Mexico and is, there- 

 fore, likely to be taken also along the mainland shore. 



R. 



CI. 



Widely ranging species 



American species 



Western Pacific species 



Eastern Pacific Insular species 

 Peculiar species 



Totals 



9 



'I 



5 

 15 



I 



18 



II 



6 



2 



10 



59 



9 



6 



42 



72 



38 



126 



Amia atradorsata and Pomacentrus arcifrons are represented 

 at the Revillagigedo Archipelago by the related species Amia 

 atricauda and Pomacentrus rcdemptus. 



