NOTES ON FISHES FROM THE PACIFIC COAST 

 OF NORTH AMERICA. 



BY CHARLES H. GILBERT. 



Plates XXV-XXIX. 



I. Netuma mazatlana new species. 

 Plate XXV. 



Ariiis platypogoii Jordan & Gilbert, Bull. U. S. Nat. Mus. v. 2, 1882, p. 44; 



Mazatlan (not Arius platypogon Giinther) . 

 Netumaplatypog07i ]orda.n, Proc. Calif. Acad. Sci. 2dser. v. 5, 1895, p. 400; 



Mazatlan. Jordan & Evermann, Fish. N. and M. Amer, pt. 3, 



1898, p. 2767; Mazatlan. 



Type:^; 294 mm. long; no. 7138 Leland Stanford Junior 

 University Zoological Collections; Mazatlan, Mexico. 

 Jordan Collection, 1895. 



This species is abundant at Mazatlan, Mexico, and in the 

 Gulf of California, and has been erroneously identified with 

 Netuma -platyfogon from Panama and Central America. 

 It differs from -platyfogon in the smoother head, which 

 bears finer granules and is more frequently covered with 

 thickened integument, in the much narrower fontanelle 

 groove, in the narrow occipital process and predorsal plate, 

 the smaller axillary pore, the smaller adipose fin, and the 

 absence of either black coloration or a ridge of thickened 

 integument on the inner faces of the ventral fins. 



In the type the head is contained 3I times in length to base of caudal; 

 width of head 55; depth of head 6. In male specimens the head is larger in 

 all its dimensions than in females, as is the case also in N. platypogon. The 

 eye is contained sf times in head, measured around the lateral contour. The 

 interorbital width equals half head, and slightly exceeds width of mouth. 

 Snout 2f in head. The maxillary barbel reaches to end of basal fifth of pec- 

 toral spine. Outer mental barbel ij, inner, 2xV in head. Width of occip- 

 ital plate \\ in its length (about i^ va. platypogon). 



(I) [255] August 20, 1904. 



