-174 PROCEEDINGS OF THE ACADEMY OF 



of medium size, with the labial papillae very conspicuous. The dorsal fin, 

 anteriorly, is slightly higher than long; its anterior insertion nearer the 

 extremity of the snout than the insertion of the caudal fin. The anterior 

 insertions of the ventral fins are opposite the anterior fourth ray of the dorsal and 

 nearer the insertion of the caudal fin, than the extremity of the snout. The 

 lateral line is nearly straight, and somewhat nearer the dorsal than the ventral 

 outline. 



The numbers of the fin-rays are D, 13. P, 16. V, 8. A, 1. C, 20. 



Color. In alcoholic specimens, the back and sides above the lateral line are 

 clear, light-blue, becoming pearly white upon the lower half of the sides and 

 upon the belly. The fins are bright yellow. 



Total length, 7 inches. 



Habitat. Kansas. 



Two well preserved specimens are in the Museum, presented by Dr. Wm. A. 

 Hammond: both probably young, 



3. Gila af finis, Abbott. Spec. char. The body is slender; tail greatly 

 attenuated. Head constituting somewhat more than one-fifth of the total 

 length. Eye rather small, subelliptical, its diameter contained six and a-half 

 times in the entire length of the head. The posterior extremity of the maxillary 

 bone extends to a vertical line, drawn posteriorly to the anterior edge of the 

 orbit. Anterior margin of the dorsal fin nearer the base of the caudal than 

 the extremity of the snout. Anterior margins of the ventral fins somewhat, 

 nearer the extremity of the snout than the base of the caudal. The lateral 

 line is nearly concurrent with the ventral outline. 3 



The numbers of the fin-rays are D, 10. P, 16. V, 8. A, 9. C, 28- 



3 

 Color. In alcoholic specimens, the back and upper third of the sides are dull 

 violet, becoming pale pink below the lateral line and upon the belly. 

 Total length, 6f inches. 

 Habitat. Kansas. 

 The Museum contains a single specimen, presented by Dr. Wm. A. Hammond. 



4. Semotilus Hammondii, Abbott. Spec. char. Body much compressed, 

 and tapering rapidly to the tail. The head constitutes more than one-fourth of 

 the length of the body, excluding the caudal fin. Snout conical ; gape of the 

 mouth oblique; the posterior extremity of the maxillary bone extending to a 

 vertical line drawn through the extremity of the pupil. Eye subelliptical; its 

 diameter entering eight times in the length of the side of the head. Anterior 

 margin of the dorsal fin equidistant between the fork of the caudal fin and the 

 extremity of the snout. Insertion of the ventrals slightly iu advance of the 

 dorsals. Dorsal fin somewhat higher than broad, and nearly quadrilateral, 

 Anal fin one-third longerthan broad, circular at its posterior extremity. Lateral 

 line concurrent with the ventral outline. A number of irregularly situated 

 tubercles on each side of the head, mostly existing in the orbital region. 



3 



The numbers of the fin-rays are D, 9. P, 18. V, 9. A, 9. C, 24- 



3 



Color. In alcoholic specimens, the upper surface of the bead, back, and 

 sides, are a deep umber brown ; belly of a bright yellow. A black spot at the 

 anterior base of the dorsal fin, and another very faint at the centre of the 

 base of the caudal. A faint black line concurrent with the lateral line. 



Total length, 7 inches. 



Habitat. Kansas. 



The Museum contains a single specimen of this fish, presented by Dr. Wm. 

 A. Hammond, to whom the species is dedicated. 



[Oct. 



