1908.] NATURAL SCIENCES OF PHILADELPHIA. 527 



dull olivaceous, other fins pale. Iris brownish with golden ring. 

 Head above minutely tuberculate. Young nearly plain-colored and 

 females usually without tubercles. Length If to SfV inches. Many 

 examples from the Susquehanna R. basin in tributaries of the Octoraro 

 Creek and the head-waters of the North East Creek, North East R. 

 basin, near Nottingham (Chester Co.). 



This little minnow is found in small streams of clear water, usually 

 about pools, and often associated with other small fishes. It is said 

 to reach 5 inches in length. The males are very gaudy in spring dress, 

 which some attain when half grown. It occurs only in our Atlantic 

 basin and, though I found it in the lower Susquehanna valley, have not 

 yet met with it in the Delaware, where, however, it has been recorded 

 by Cope. 

 Leuoisous elongatus (Kirtland). 



Head 3^ to 4; depth 41 to 5^; D. iii, 7, i; A. iii, 8, i, seldom iii,. 

 7, I, rarely iii, 9, i ; scales 60 to 75, usually about 60 to 69 + usually 

 2, frequently 3, rarely 4; usually 13 scales, frequently 12, seldom 11,. 

 rarely 14, above 1. 1.; usually 7 scales, frequently 8, below 1. 1.; 25 to- 

 38, usually 28 to 35, predorsal scales; snout 3|- to 3f in head; eye 2f 

 to 41; maxillary 2yV to 2^ ; teeth 2, 5-4, 2, frequently 2, 4-4, 2. Body 

 compressed, elongate. Head compressed, rather pointed. Snout 

 convex. Eye round, high. Mouth large, well inclined, mandible pro- 

 truding. Maxillary trifle beyond pupil front. Rakers about 2 + 5 

 short points. Scales small, about uniform. L. 1. little decurved, 

 complete in adult, incomplete or absent in young. Dorsal origin 

 little nearer caudal base than snout tip. Anal httle behind dorsal 

 base. Caudal emarginate. Pectoral | to ventral, latter inserted 

 little before dorsal origin and fin f to anal. Color olivaceous above, 

 scales mottled darker. Lateral band of blackish, first half bright 

 red in spring males. Below silvery-white. Lower fins reddened in 

 spring males. Dark median dorsal streak. Iris silvery, dark lateral 

 band passing through. Length 1^ to 3f inches. Many examples 

 from the Allegheny R. basin at Cole Grove and Port Allegany (McKean 

 Co.). 



Resembles the preceding. Found only in the clear mountain streams 

 west of the Alleghanies, usually associated with other small fishes. 

 Said to reach 5 inches and be a good bait minnow. 

 Leuoisous margarita (Cope). 



Clinostomus margarita Cope, Trans. Am. Philos. Soc. Pliila., (2) XIII, 1869 

 p. 377, fig. (teeth), PI. 13, fig. 1. The Conestoga, near Lancaster. ' 



Head 4; depth 4*; D. evidently iii,? 7, i (damaged); A. iii, ? 7? 



