510 PEOCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



broad leaden band, which narrows behind on the caudal peduncle and 

 becomes a dusky band, ending in an ill-defined caudal sj)ot. There is a 

 narrow dorsal baud. The top of the head and snout, as well as the 

 lower jaw, are dusky. The belly is pale. 



The dorsal and caudal are red, with more or less dusky. There is no 

 dark spot at the base of the dorsal, as in some species of Lythrvrns ; but 

 there is a distinct black spot on the upper part of the anterior rays of 

 the dorsal. There is a similar black spot at the distal ends of the ante- 

 rior anal rays. The anterior rays of the pectorals are dusky. 



Large numbers of this species were collected at Enterprise. The 

 largest specimens have a total length of 2^ inches. 



41. Minnilus bellus, Hay, sp. nov. (No. 27,426.) 



Adults of this species resemble much the young individuals of 

 Notemigonus chrysoleucus. 



The body is short, deep, and considerably compressed. The dorsal 

 region is elevated. Depth contained in the length about 3f times. 

 Head short, in length of body from 4 to 4^ times. Muzzle short, rather 

 pointed; the profile in adults concave; mouth quite oblique, large, the 

 maxillary reaching back to the anterior rim of the orbit ; the lower jaw 

 rather longer than the upper. The eye moderate, 3^ in the head. 



The lateral line is much decurved anteriorly. Scales 7 or 8-40 to 

 42-3, crowded forward, higher than long, about 25 in front of the 

 dorsal. Teeth 2, 4-4, 2, "sharp-edged", but icith a "masticatory sur- 

 face". 



Fin-rays, D. I, 8 ; A. I, 10-11. Dorsal situated midway between the 

 tip of the snout and the origin of the caudal, wholly posterior to the 

 ventrals, nearly twice as high as long, its length being contained in the 

 head 1§ times. Anal contained in the head IJ times, a little higher 

 than long, ventrals reaching the vent, the pectorals not extending to 

 the ventrals. Caudal peduncle very little longer than the head, and 

 rather slender. 



Color (in spirits) somewhat dusky above, with a narrow, dark dorsal 

 line ; sides silvery, with a dull, leaden line along the caudal peduncle. 

 Occasionally, in some of the most highly colored si>ecimens, a few scales 

 on the side are widely margined with black, so that the sides appear 

 splotched. The lower part of the body is in life almost flame-color. 

 All the fins orange, at least at their bases. At least the tips of the 

 dorsal, ventral, and caudal jet-black, l^o spot at the base of dorsal. In 

 some adults the whole dorsal has black pigment mingled with the 

 orange, besides having the rays tipped with black, and the distal half 

 of the ventrals and anal black. Very few specimens are without the 

 black tips to the fins, so that this becomes a distinctive character. 

 Evidences of the existence of tubercles were observed on the heads of a 

 few specimens. 



