182 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY - IV. 



L. 3 inches. Alabama l&asin ; ubuiidaut in clear streams, with the 



preceding and the next. 



(Cotfama trichrointia Jordan & Gilbert, Bull.U. S. Nat. Mus. xii, 1878, 50.) 



U. Adult males without red. 



m. A very conspicuous black spot at base of caudal. 



C. stigmatura Jordau. Spotted-tail Minnow. 

 Body elongate, fusiform, compressed. Head quite long, rounded 

 above, the snout pointed. Mouth rather large, somewhat oblique, over- 

 lapped by the narrow upper jaw. Eye small, 4 in head; iris white. 

 Maxillary reaching beyond nostrils; premaxillary on the level of lower 

 edge of pupil. Scales large, closely imbricated, 20 in front of the dor- 

 sal. Fins low, the dorsal rather behind veutrals, its height less than 

 one-fifth the length of the body. Color pale, clear olive ; black dorsal 

 spot not very distinct ; fins with their tips charged with satin- white 

 pigment, otherwise plain ; a very distinct, large, oblong or quadrate jet- 

 black spot at base of caudal, the color extending up on the rays. This 

 spot is visible on all specimens, and is larger than in any other of our 

 Cyprinidce; its length about one-third that of the head. First ray of 

 dorsal dark in front; males with an obsolete black spot on the middle 

 of the sides in front of the dorsal, as is often seen in Chartwinuhr, the 

 head, etc., tuberculate in spring. Head 4J; depth 4*. D. 8; A. 8; 

 scales 7-42-3; teeth 1, 4-4, 1. L. 4.} inches. Alabama and Mississippi; 

 \ ery abundant. The largest species of this section of the genus and 

 one of the most graceful. 



(1'liotofienin stigmatnrm Jordau, Ann. Lye. Nat. Hist. N.Y. 1870, 337 : Codoma %wa- 

 tura Jordan, Bull. U. S. Nat. Mus. xii, ~>2 : Litxiluschicasavensi/illny, Proc. U. S. Nat. Mus. 

 1860,506.) 



mm. No conspicuous black spot at base of caudal. 



23-1. C. cscriilca Jordan. 



P.ody fusiform, somewhat elongate, moderately compressed. Head 

 moderate. Snout rather pointed, overlapping the small, oblique mouth, 

 maxillaries reaching nostrils, premaxillaries below level of pupil. Kye 

 moderate, :',.\ in head. Scales firm, \~> in front of dorsal. Lateral line 

 declined. Fins all high, the height of tin- dorsal nearly one -fifth the 

 length of the fish; dorsal behind ventrals. Males with the snout 

 ihickly tnl>ercnlate. Color bright steel-blue; the. sides and belly sil- 

 very white ; a very distinct lateral band of a bright blue-green color, 

 most distinct posteriorly, and forming a spot at the base of the caudal 

 fin; dorsal blotch rather faint and diffuse; tips of dorsal, anal, and 



