FISHES OF SINALOA. 387 



nor are we certain that any others have been observed by them; and if we 

 may judge by their figures of each, it should seem that the first described 

 was the most plentiful. That figured in Gesner is far from a bad repre- 

 sentation, and the one engraved by Knorr in his Delicise is sufficiently 

 accurate. This species differs from the first, in having the snout more 

 narrow in proportion at the base, and the -whole of it more slender in all 

 its parts; whereas the first is very broad at the base, and tapers consider- 

 ably from thence to the jpoint. The spines on each side also are longer 

 and more slender, and vary from 24 to 34 in the different specimens; we 

 have indeed been informed of one which contained no less than 35 spines 

 on each side of the snout; but we must confess ttiat we have never been 

 fortunate enough to have seen such a sjaecimen. This is supposed to 

 grow to as great a size as the former, and in the general make and shape 

 of the body does not materially differ." {Latham, Trans. Liun. Soc, 

 1794, p. 278.) 



The following description of Pristis ^ectinatus Latham 



(Pristis granulosa Bloch & Schneider) is taken from a 



specimen two feet long, from Key West, Fla. : 



Snout to nasal-lobes, 3 in length of body to base of caudal; width of 

 anterior end of saw between first two pairs of teeth, equal to the inter- 

 nasal space, I the base behind last pair of teeth; saw with 26 teeth on a 

 side; eye larger than spiracle, half interorbital space; width of mouth 

 eqiial to its distance to front of nostril; teeth In mouth in about 70 series; 

 width across outer angle of pectoral fins, 1\ in length from eyes to base 

 of caudal; width of body behind pectorals, 7. Height of pectoral slant in 

 front, 3 in snout to mouth; dorsals subequal; caudal, with no lower lobe, 

 equal to pectoral slant. 



Color, uniform brown above, below light. 



Family RHINOBATID^. 



12. Rhinobatus glaucostigma Jordan & Gilbert. Gui- 



TARRO. 



Very common on sandy bottoms in the estuary or 

 Astillero at Mazatlan, where the species was originally 

 found by Dr. Gilbert. 



Family NARCOBATID^. 



13. Narcine entemedor Jordan & Starks, n. sp. En- 



TEMEDOR. 



Two specimens taken in the estuary at Mazatlan, and 



