15 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 Deliciz 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 point. 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 that we have never been 
fortunate enough to have seen such a specimen. 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. Linn. Soc., 
1794, p. 278.) 
The following description of Przst7s pectinatus 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, } the base behind last pair of teeth; saw with 26 teeth ona 
side; eye larger than spiracle, half interorbital space; width of mouth 
equal to its distance to front of nostril; teeth in mouth in about 70 series; 
width across outer angle of pectoral fins, 24 in length from eyes to base 
fod 
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. Gut- 
TARRO. 
Very common on sandy bottoms in the estuary or 
Astillero at Mazatlan, where the species was originally 
found by Dr. Gilbert. 
Family NARCOBATID/E. 
13. Narcine entemedor Jordan & Starks, n. sp. ENn- 
TEMEDOR. 
Two specimens taken in the estuary at Mazatlan, and 
