476 PROCEEDINGS OF THE ACADEMY OF [Oct., 



from tip of upper jaw. Body strongly compressed, edges rounded. 

 Head robust. Snout broad and convex. Lips without triangular 

 cutaneous corners, though broad. Upper teeth 5 in each external 

 series, and with a transverse connecting series of 4. Mandibular 

 teeth larger, 8 in number, 4 median greatly enlarged and pair at 

 symphysis each with a large external cusp. All teeth with a cutting 

 edge, and some, like transverse series above, bicuspid. Tongue not 

 free, broad and rounded in front. Interorbital space broad and con- 

 vex. Gill-opening forward opposite front of eye. Rakers 12 + 18, 

 lanceolate and equal pupil. Filaments a trifle less than orbit. Tubes 

 in lateral line simple. Color in alcohol dull or pale brassy-brown, 

 back a little darker than lower surface and everywhere with more or 

 less brassy reflections. Fins all pale or uniform brownish. Iris dull or 

 pale orange. Length 6 inches. Type. 



The others show: Head 2f to 3^; depth 1^ to H; D. iii, 13, i to 16, i, 

 usually 14, i or 15, i; A. iii or iv, 31, i to 36, i; scales 70 to 78 in lateral 

 line to base of caudal, and 3 to 9 more on latter; serratures41 to 47 + 

 4 to 8 on abdomen; snout 3 J to 4 in head; eye 2f to 4; interorbital 

 space 2| to 2^; pectoral li to If; ventral 2 to 2^; total length of body 

 2i| to 5^ inches, with caudals mostly damaged. The opercular blotch 

 at present is only a little brownish in most cases. 



STARKSINA gen. nov. 

 Type Myletes herniarius Cope. 



Body nearly as deep as long. Profile of belly well rounded convexly 

 and pendant. Abdominal serratures rather few, 41. Posterior series 

 of teeth in upper jaw separated from anterior by an interspace. Anal 

 and caudal more or less covered with small scales passing out from 

 body without special demarcation. Adipose fin small and free. No 

 external free short cultrate predorsal spine. 



(Dedicated to Mr. Edwin C. Starks, of the Leland Stanford Junior 

 University, California, well known for his contributions to the 

 osteology of fishes.) 



Starksina herniarius (Cope). Fig. 56. 



Myletes herniarius Cope, Proc. Acad. Nat. Sci. Phila., 1871 (1872), p. 268, PI. 

 12, fig. 3. Cotypes, Nos. 7,990 and 8,025 (type), A. N. S. P. Ambyiacu 



River. John Hauxwell. Cope, Proc. Amer. Philos. Soc. Phila., 



XVII, 1877-78 (May 17, 1878), p. 693. Peruvian Amazon. Prof. J. 

 Orton. 



Width of head If in its length; interorbital space 21 in head, meas- 

 ured from tip of upper jaw. Edges of body more or less trenchant. 

 Head well compressed, becoming a little restricted below. Snout 



