VOL. XII, PP. 1-3 JANUARY 27, 1898 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



NOTES ON FISHES COLLECTED BY E. W. NELSON ON 

 THE TRES MARIAS ISLANDS AND IN SINALOA 

 AND JALISCO, MEXICO. 



BY BARTON WARREN EVERMANN, 



Ichthyologist, U. S. Fish Commission. 



While engaged in collecting other objects of natural history 

 in Mexico during the summer of 1897, Mr. Nelson obtained a 

 few fishes, which were submitted to the writer for identification 

 and report. 



The collection contains four species, one of which proves to be 

 new. The specimens were obtained at Rosario, Ixtapa, La La- 

 guna de Juanacatlan and the Tres Marias Islands. 



Rosario is situated about 80 miles southeast from Mazatlan 

 and about 18 miles from the sea. The specimens from that place 

 were obtained from freshwater pools left by the drying up of that 

 portion of the Rosario River. The exact locality was about 15 

 miles above tide. 



Ixtapa is in the State of Jalisco, on the Ixtapa River, about 

 12 miles above the head of the Bay of Banderas. The specimens 

 from Maria Magdalena Island came from the interior about 250 

 feet above tide level, from a small stream which communicates 

 with the sea during the rainy season. Those from Maria Cleofa 

 came from a small freshwater stream close to the sea, but com 

 municating with it only in wet weather. Maria Magdalena and 

 Maria Cleofa islands are the two most southern of the Tres Marias 

 group, situated about 60 miles off the coast of Jalisco. La 

 Laguna de Juanacatlan is in the Sierra de Juanacatlan, in west 

 ern Jalisco, at an altitude of 6,500 to 7,000 feet. 



1 BIOL. Soc. WASH., VOL. XII, 1898 (I) 



