FISHES FROM ECUADOR AND PERU—STARKS. 



763 



The following ten species are here described as new. 



Faniily (i^ALEID.T^]. 



I. CARCHARIAS AZUREUS Gilbert and Starks. 



A specimen considerabl}^ larger than the t^qje, and agreeing with it 

 very well in all essential characters, was collected at Guayaquil, Ecua- 

 dor. It was preserved in alcohol as a partially skinned specimen. 

 As in the type, the claspers are undeveloptnl and fail to reach to the 

 posterior margin of the ventral fins. 



2. CARCHARIAS CERDALE (Gilbert). 



Three small specimens from (ruayaciuil agree very well with the 

 typical specimens from Panama. 



Family SPHYRNIDvE. 



3. SPHYRNA ZYGJENA (Linnaeus). 

 One specimen from Callao, Peru. 



4. SPHYRNA TIBURO (Linnaeus). 



A specimen collected at Guayaquil, Ecuador. Although this species 

 was not reported from the Pacific until 1895, it appears to be as com- 

 mon as .S. tudes^ and will probably l)e found to have as wide a range, 

 at least in American waters. 



Family RHINOBATID^. 



5. RHINOBATUS LEUCQRHYNCHUS (Giinther). 



A specimen 43 cm. in length from Guayaquil, Ecuador. It differs 

 from a specimen from Panama, 38 cm. in length, in having the snout 

 more blunt, the rostral ridges not so narrow, and the lateral edge of 

 disk a little more concave. In all of these respects about intermedi- 

 ate between the Panama specimen and a specimen of E. glmicostlgma 

 from Mazatlan, 57 cm. long. It has no trace, however, of the charac- 

 teristic slate-colored spots on the back or the dark blotch under the 

 tip of the snout pf R. glcmeostigrim. Both specimens of R. leucorhyn- 

 ckus have the dorsals darker than in R. glaucostlgma, and the shagreen 

 appears to be a little rougher and coarser. 



