70 BULLETIN OF THE UNITED STATES FISH COMMISSION. 



these the edges of the scales, especially on the upper surface of the 

 body, are tinged with purple. There is a faiut baud of purple along 

 the sides, while the whole top of the head, the opercles, aud the snout 

 are bluish purple. The bases of the dorsal and caudal fins are red. 

 These colors are soon lost in alcoholic specimens. 



41. Hemitremia maculata Hay. — Spot-tailed Hcmitreme. 



Several specimens of this species were secured at Vicksburg and at 

 Jackson. 



42. Luxilus cornutus (Mitch.) Raf. — Common shiner. 



No specimens of this species were found in Western or Central Mis- 

 sissippi. It is abundant enough in the eastern part of the State. I 

 have adult specimens from Enterprise. 



43. Luxilus stigmaturus Jor. — Spot-tailed Minnow. 



Luxilus chickasavensis Hay, Proc. U. S. Nat. Mus. 1880, iii, 506. 



This proves to be an exceedingly variable species, both in the form and 

 proportions of the body and in the style of its ornamentation; and ou 

 one of its forms was established the species chickasavensis. I have now 

 specimens from the Big Black at Edwards, and from the Pearl at Jackson. 

 These, together with specimens from Eastern Mississippi and from the 

 Alabama River, enable me to give a more comprehensive description of 

 the species. In form the fish varies from stout and heavy to elongated, the 

 depth running from 3£ to 5 times in the length. The number of scales 

 in a horizontal row ranges from about 36 to 45. The large jet-black 

 spot at the base of the caudal fin is one of the most distinctive marks 

 of the species; but in some of my specimens from the Big Black even 

 this spot is obsolete. In other specimens taken along with these the 

 spot is very distinct. The diameter of the eye is usually somewhat less 

 than the length of the snout, sometimes equal to it; but in a few speci- 

 mens it is contained nearly twice in it. 



A few of the specimens that I obtained were quite highly colored. 

 The sides of the body were of a bright leaden blue, this color sometimes 

 extending down to the bases of the paired fins. The scales on the dor- 

 sal region were olive, edged with blue. Top of the head and a streak 

 along the back also blue. The base of the caudal red, the top blue. 

 The base of the dorsal red, the upper half filled with white satiny pig- 

 ment. Anal and paired fins also charged with the same pigment. The 

 resemblance of such highly colored individuals to L. unalostanus in their 

 full nuptial dress is so complete that they might easily be mistaken for 

 the latter species, were it not for the black caudal spot. 



Sometimes the males have considerable areas of their bodies covered 

 with tubercles. Most commonly we find the tip of the snout swollen 

 and densely covered with prickles. Behind this the regiou in front of the 

 eyes, the whole upper surface of the head, and the middle line as far 

 back as the dorsal fin are furnished more or less with similar prickles. 



