PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 509 



Fin-rays as follows : D. I, 8 ; A. I, 10-11. Dorsal beginuing midway 

 between the muzzle and the base of the caudal ; its length one-half, its 

 height two thirds, the head. Anal in length three-fifths, in height four- 

 fifths, the head. Caudal peduncle compressed, and contained in the 

 length of the body 4^ times. 



The body is of a straw-color above, silvery along the sides and below. 

 The scales above the lateral line are dark-edged from a succession of 

 black dots, which are large enough to be seen by the unaided eye. A 

 dark dorsal line of similar, but a little larger, black points. Along the 

 sides anteriorly are a few such dots ; posteriorly they increase so much 

 that on the caudal peduncle they form a dark band. The head, and 

 especially the snout, are sprinkled with similar dots. There is a black 

 spot at the base of the dorsal fin anteriorly. Opercles silvery. Size of 

 largest specimens 2 inches. Corinth. 



This minnow resembles somewhat Notropls lirus, Jord., but is a less 

 slender species, has a smaller eye, and has not the conspicuous band of 

 metallic blue of that species. Rotropis matutinus (Cope) Jord., also ap- 

 pears to be a much slenderer species, the depth being contained in the 

 length 6 times. Also there are said to be but 7 rows of scales above 

 the lateral line. 



I do not think that there are sufficient differences in the teeth of the 

 species of Notropis, or Alinnilus, and those of Lythrurus to justify the 

 separation of these species into two genera. If there is such difference, 

 Notropls lirus ought to be written Lythrurus lirusy for the masticatory 

 surfaces of its teeth are as i)lain, to me at least, as in L. diplwmius. 



40. Minnilus rubripinnis, Hay, sp. nov. (No. 27,420.) 



Body long and slender, somewhat compressed, the depth in the length 

 4f times. Head arched transversely above; muzzle very pointed. 

 Mouth oblique, large; the lower jaw slightly longer than the upper; 

 the maxillary reaching to a vertical from the front of the eye. The eye 

 is large, being contained in the length of the side of the head 3 times, 

 and its diameter slightly greater than the snout. Head contained in 

 the length 4i times. 



Scales small, especially in front of the dorsal fin, somewhat higher 

 than long, but not so densely imbricated as in the next species. Rows 

 of scales represented by the formula 7 to 9-45 ±-3. Lateral line much 

 decurved anteriorly. 



The dorsal is situated far back, midway between the pupil of the eye 

 and the base of the caudal, and considerably posterior to the ventrals ; 

 its rays, I, 8; its length one-half the head, its height three-fourths. 

 The anal is long, being three-fourths the length of the head, height one- 

 half the head ; its rays, I, 12. 



The pectorals do not reach the ventrals ; the latter attain the vent. 



The coloration of this species is dark in s])irits, all the scales above 

 the lateral line being covered with black points. Along the sides is a 



