ON A COLLECTION OF FISHES MADE BY V. O. SIMONS 

 IN ECUADOR AND PERU. 



B}^ Edwin Chapin Starks, 



Of Stanford University, California. 



The collection on which this paper is based inclu(l(^s both marine 

 and fresh-water species, and was made by the late Mr. P. O. Simons, 

 in Ecuador and Peru, during- the winter of 1898 and 1899. 



With one or two exceptions the marine fishes were collected at 

 Gua3'aquil, Ecuador, and Callao, Peru. Thej illustrate ver}'- well the 

 faunal relations of these localities. Guayaquil lies about equidistant 

 between Panama and Callao, but belongs distinctly to the faunal region 

 of Panama and northward. 



All of the 44 species that were taken at Guayaquil are also found at 

 Panama, with the exception of three species described as new from 

 Guayaquil and one species of the southern fauna not extending north 

 of Guayaquil (mentioned below). Sixteen of these have not been 

 taken north of Panama and 24 extend their rar.go to the Gulf of 

 California. 



Of the 34 species collected at Callao 23 have not been taken farther 

 north, 11 have been taken north to the Gulf of California, and the 

 other one not north of Guayaquil. 



Thus it appears that with a single exception the Hshes extending 

 their range north of Callao are species of wide distribution. Five of 

 the eleven can. not perhaps fairly be considered in this connection. 

 Spliyrna zygaena^ Scomber japonicus, Sarda chlUnsln^ CaidolatUm 

 princeps are of such verj^ wide distribution, and Anisotremus scapular ifi 

 was, with little doubt, erroneously reported from Mexico. 



The species of Guayaquil are in all cases very nuich darker than the 

 same species from Panama, making it appear probable that the faunas 

 of these two localities, though similar, do not intermingle. 



The drawings^ for this paper were made by Chloe Lesley Starks. 



Proceedings U. S. National Museum, Vol. XXX— No. 1468. 



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