PACIFIC FRESH WATER FISHES. 263 



III. 



NOTE ON A COLLECTION OF FISHES MADE IN STREAMS 

 NEAR CAPE SAN LUCAS BY DR. GUSTAV EISEN. 



A small collection of fishes, consisting of nine species, 

 was obtained by Dr. Gustav Eisen in fresh water streams 

 about Cape San Lucas, in Baja California. The species 

 are all well known, but their occurrence in this region is 

 worthy of record. 



1. Siphostoma starksi Jordan & Culver. 



Numerous specimens of this species from San Jose del 

 Cabo. They differ somewhat from the types of Siphos- 

 toma starksi in having a longer body and shorter tail, 

 though there is considerable variation in both lots of 

 specimens. 



Head 10^ to 10^ ; dorsal 37 to 39; pectoral 13. Head 

 2}{ to 4 in distance from snout to vent; head and body 

 1 24 to if in tail; snout i l / 2 to 2f in head. Two lateral 

 keels on body, the upper ceasing and the lower curving 

 upward under posterior part of dorsal, as in the types. 

 Dorsal beginning over, or in some specimens, one seg- 

 ment behind vent. Color quite dark, a rather regular 

 series of light -colored dots along sides ; middle rays of 

 caudal black, outer with irregular blotches. 



2. Agonostomus nasutus (Giinther). 



One specimen, 4% inches long, from San Jose del 

 Cabo. It agrees in all essential characters with the orig- 

 inal description, which was based on a specimen 8}4 inches 

 long from the Rio San Geronimo in Guatemala. The eye, 

 however, is 3*^ in head, 4-5- in an 8-inch specimen from 

 Mazatlan, instead of 5; the caudal is emarginate, the 

 middle rays f length of outer. The soft dorsal is not so 

 high as the spinous dorsal and is as high as the anal, in- 



