SYNOPSIS OF THE FAMILY HETEROPYGII. 61 



Chologaster cornutus AGASSIZ. 



AGASSIZ, Amer. Jour. Sci., xvi, p. 135, 1853. GIRARD, Procd. Acacl. Nat. Sci. 

 Philad., p. 63, 1859. GUNTHER, Cat. Fish. Brit. Museum, vii, p. 2, 1868. PUTNAM, 

 Amer. Nat., vi, p. 21 et seq., with figs. Jan., 1872. 



PLATE 2 (Amer. Nat., Vol. vi, Jan., 1872). FIG. 2. Natural size. 2a, stomach 

 and pyloric appendages, twice nat. size. 26, scale magnified (nat. size represented 

 by small outline over the left of the fig). 2c, abdominal cavity showing stomach 

 and single ovary behind the stomach, twice nat. size. 



Head more than half as wide as it is long. Length, of head, from 

 tip of under jaw to end of operculum contained twice in length of 

 body from operculum, to caudal fin. Width between the eyes equal to 

 distance from eye to tip of under jaw. 



Eyes of moderate size, situated just back and over the end of the 

 maxillaries. 



Dorsal and anal fins of nearly equal size, slightly rounded. Anal 

 with slightly longer rays and commences under fourth ray of dorsal. 



Pectoral fins pointed, reaching to line of commencement of dorsal. 



Caudal fin pointed, about equal in length to the head. Membrane 

 above and below extending but slightly on the tail. 



Scales very small and deeply imbedded in the skin. Circular with 

 small smooth space forward of the centre. From 15 to 20 con- 

 centric rings, cut by a few short radiating furrows on anterior, and 

 longer and more numerous ones on posterior margin. 



Intestine is a little longer than in an Amblyopsis of the same size. 

 The two pyloric appendages on the left side are close together and 

 broader than the two on the right side, which are wider apart, 

 longer and more slender than the others. 



Color. Yellowish brown, much darker above, lighter on sides, and 

 light yellow on under part and sides of head, belly and under part of 

 tail. Three longitudinal very dark brown lines on each side: the 

 upper commencing near the middle of top of head and following 

 along the back to base of caudal fin ; the middle one commencing at 

 the nostril and passing through the eye to upper portion of opercu- 

 lum, thence about in the centre of side to about the centre of base of 

 caudal fin ; the lower commences under the pectoral fin and follows 

 the ventral curve of the body to the base of caudal fin. All three 

 lines are darkest and broadest forward, and terminate as a series 

 of nearly confluent dots on the tail. Central rays of the caudal dark 

 brown, outer rays uncolored. Dorsal, anal and pectorals not colored. 



Measurements. The three specimens are respectively 1-5, 2, and 2-3 

 inches in total length. 



Geographical distribution. South Carolina. 



Specimens examined: 



MUSEUM or COMPARATIVE ZOOLOGY. 



3 specimens. No. 776. Rice Ditches at Waccamaw, S. C. Presented by P. C. 

 J. Weston, 1853. (Orig. of Agassiz.) 



