eA PROCEEDINGS OF THE NATIONAL MUSEUM. 285 
is one-fourth of the total without caudal. The depth is two-sevenths of 
‘the same length. The dorsal origin is over the seventeenth scale of the 
| lateral line and immediately over the ventral origin. The ventral 
| reaches to the vent. 
D. iii, 7; A. iii, 7. Scales, 9—45—5. Teeth 4—4, scarcely hooked; 
a narrow grinding surface developed on three of them. 
Fundulus robustus, new species. (Plate XLtv, fig. 2.) 
The types of the species are numbers 43760, U.S. National Museum, 
collector’s No. 173, and 43762, the first being a female and the other 
| amale. 
The length of the female to the base of the caudal is L07 millimeters ; 
total length, 126 millimeters. The greatest height of the body at the 
origin of the ventral (37 millimeters) is slightly more than one-third of 
the length without caudal. The length of the head is a little less than 
one-third of the total without caudal. The least depth of the caudal 
peduncle is one-half of the greatest depth of the body. The head is 
broad, the distance between the eyes equal to the length of the eye and 
the snout combined. The top of the head is nearly flat, and the nape is 
moderately elevated. The eye is as long as the snout, its length con- 
tained from four and one-half to five times in that of the head. The 
mouth is very obliquely placed, and the lower jaw is longer than the 
upper. The end of the maxilla reaches to below the front of the eye. 
The intermaxillary is very protractile; the width of the mouth is one- 
third the length of the head. Teeth in the jaws in narrow bands or 
| biserial, all conical, the outer series somewhat enlarged. Gill-rakers 
short, stout, about nineteen on the first arch. There are thirteen seales 
between the upper angle of the gill opening and the origin of the dorsal. 
The dorsal commences nearly midway between the tip of the snout and 
the end of the tail. 
The dorsal base is one-half as long as the head and a little longer than 
the longest dorsal ray. The ventral origin is midway between the tip 
of the snout and the base of the caudal. In the male the fin reaches to 
the vent and nearly as far in the female. The anal origin is under 
the middle of the dorsal base, and the last ray is under the last dorsal 
cay. In the female the first six rays are short and stiff, and the genital 
opening is immediately in front of, but disconnected froin, the anal fin. 
The anal base is nearly as long as the longest anal ray and one-third as 
long as the head. In the male the middle caudal rays are one-half as 
long as the head; slightly shorter in the female. The longest dorsal 
ray (fifth) in the female is considerably more than one-half the length 
of the head, while in the male it is considerably less than one-half length 
of head. 
B. 5; D. 14;@A. 16; V.6; P.16. Seales, 16—38. 
| The color at present is uniform pale brown; fins unspotted and the 
| opercle with a golden tint. 
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