FISHES OF SINALOA. 4l5' 



56. Tylosurus stolzmanni (Steindachner). Sierrita. 

 Occasionally taken in the harbor of Mazatlan, where 



specimens, the types of Tylosurus siei'rita, were taken by 

 Dr. Gilbert. One large specimen obtained by us. Its 

 measurements differ somewhat from those given in the 

 type of Tylosurus sierrita. The distance between the eyes 

 is 8^ in head. The maxillary reaches beyond the ver- 

 tical from front of pupil. The eye is 3 in postorbital part 

 of head. Head not quite 2 in length. D. 1.15; A. 1.17. 

 Pectorals with dusky specks, but not notably black at tip. 

 This fish is probably identical with Tylosurus stolzmanni, 

 described by Steindachner from Tumbez, Peru. The 

 snout in our specimen, as in the type of sierrita, is shorter 

 than in Tylosurus stolzmanni. 



Family HEMIRAMPHID^. 



57. Hyporhamphus roberti (Cuvier & Valenciennes). 

 Pajarito. 



Exceedingly common about Mazatlan, swimming in 

 schools in open water, especially numerous in the bay; 

 those of the same age and size go together. Schools of 

 adults and schools of half grown specimens will be found, 

 each moving about independently of the other. It is highly 

 valued as a food fish, although distinctly inferior to Sar- 

 dinella stolifera. 



Lower jaw, measured from tip of upper, two times 

 length of rest of head. Snout, 2^ in head. 



This species is found along the whole Pacific Coast of 

 tropical America, and from Cape Cod to the mouth of the 

 Rio Grande, being everywhere common southward. We 

 have seen no specimens from the West Indies. 



The type of Hemirham^hus roberti Cuvier & Valen- 

 ciennes, came from Cayenne, coll. Poiteau. Through 

 the kindness of our friend. Dr. F. Bocourt, of the Mu- 



