284 NOTES ON MEXICAN FISHES—BEAN. 
Juato, Mexico, The first is No. 169 of his series, and the other is 174, 
No. 169 was taken at Guanajuato and No. 174 in Lake’ Yuriria. The | 
length of No. 41818 is 7 inches to the base of the caudal, the total 
length 82 inches. The smaller example is 54 inches to the caudal base; 
total length, 65 inches. The height of the body in the larger specimen 
equals the length of the head, and one-quarter of the total without | 
caudal. In the smaller example the height is contained four and one- 
half times in the same length. The least depth of the tail is from one- 
half to two-fifths that of the greatest depth. The eye is placed near 
the top of the head; its diameter is contained one and one-half times 
in the length of the snout and from five to five and a half times in 
the length of the head. The lower jaw is slightly included; it has a 
small knob at the symphysis. The maxilla reaches to below the front 
of the eye. The dorsal origin is midway between the tip of the snout 
and the base of the caudal (over the twenty-eighth scale of the lateral 
line). Its base equals two-ninths of its distance from the tip of the 
snout. The longest ray is two-thirds as long as the head and more than 
twice as long as the last ray. The scales are very small and much 
crowded anteriorly, larger behind. The ventral origin is under the- | 
middle of the dorsal base; the fin does not reach to the vent, its length 
equal to that of the postorbital part of the head. The pectoral is as 
long as’ the head without the snout. The anal origin is distant from 
the ventral origin a space nearly equal to the length of the head. The 
length of the anal base is about equal to that of the snout. The longest 
anal ray equals the length of the ventral, and fully twice the length of 
the last ray. 
Dos AG. V9: Po 16: 
Scales 18, 69 to 72,13. The lateral line is Sharply decurved over the 
pectoral, and, in the straight portion, is below the median line of the 
body. The caudal is large and well forked, its middle rays three-fifths 
as long as the outer. 
The color is dusky brown, the cheeks and opercles silvery, and the 
belly whitish. A very indistinet dark Spot at the caudal base, deeper 
than long, its depth about equal to the diameter of the eye. The dor- 
sal, caudal, and pectoral fins dusky; the pectorals, ventr: Is, and anal 
mingled with silvery. Teeth 4—4. The three largest with a broad 
grinding surface, and the second, third and fourth with a slight hook. 
On the other side of the same example all of the teeth have a well de- 
veloped grinding surface. Gill-rakers, four above the angle and fifteen 
below; the longest about one-third as long as the eye. 
The species is named in honor of its discoverer, Prof. A. Duges. 
Hudsonius altus Jordan. 
A single example of this species, catalogue No, 43763, eollector’s No. 
175, obtained at Lake Yuriria, Mexico, is 64 inches long. The eye is 
nearly as long as the snout and two-ninths as long as the head, which 
