268 PROCEEDINGS OF THE ACADEMY OP 



MYLETES OCULUS, Cope, sp. nov. 



Premaxillary series of teeth in contact. Radii D. 15 ; A. 24 ; 

 Y. T, reaching the vent, and commencing below the first dorsal 

 ray. Pectorals reaching base of ventrals. Preanal spines 43. 

 Form stout ovate, dorsal and ventral curvatures equal. Depth 

 1.Y5 times in length without caudal ; length of head 2.5 times in 

 same; caudal fin bifurcate. Orbit 3.3 times in length of head 

 (of an individual .065 m. long), 1.15 times in the rather flat inter- 

 orbital space. Profile concave, operculum rugose. Depth of above 

 individual .0215 m. ; length to dorsal fin .03 ; to anal .031. 



Color dark plumbeous, with a black spot with a wide white 

 bordering ring just above the lateral line below the anterior part 

 of the dorsal fin. Many specimens with vertical dark shades or 

 fasciae. Anal fin blood-red, black at base. 



This species is well distinguished by its stout head and jaws, 

 and especially the ocellus on the side. The details do not agree 

 with those of any described species. 



MYLETES HERNIARIUS, Cope, sp. nov. 



Form subquadrangular or broad diamond-shaped from the 

 angular elevation of the back, and the abrupt prominence of the 

 abdomen. The thoracic outline is concave below the pectoral 

 fins. Radii D. 18; A. 32; ventrals reaching vent, not attained 

 by the small pectorals. Abdominal spines of unusual length, 

 spine-shaped, 46 in number. Depth 1.4 times in length without 

 caudal fin ; length of head three times in same. Orbit (in indi- 

 vidual of .05 m. in length) 2.6 times in head, less than the slightly 

 convex interorbital space. Profile concave ; chin and muzzle pro- 

 jecting. Plumbeous above, silver below ; a very few small dusky 

 dots ; anal fin blackish. 



Length to dorsal fin (of above individual) .022 ; to anal .027 ; 

 depth head at preopercular angle .01 m. 



The very prominent abdominal saw, and spine-like form of its 

 teeth, distinguish this species. Two specimens. 



SERRASALMO IRIDOPSIS, Cope, sp. nov. 



D. 15-6; A. 34; abdominal spines prominent, forty-one. Depth 

 of body one-half length without caudal fin; length head a little 

 greater than one-third the same. Orbit 3.8 in head, a little less 



[January 16 



