eigenmann: the cheirodontin^. 99 



APPENDIX. 



Since the foregoing pages were sent to press the author has discovered among 

 the material collected by Mr. Henn during his explorations in Ecuador an addi- 

 tional species, a description of which follows: 



56. Megalamphodus ecuadorensis sp. nov. 



13628, I. U. M. Type, about 28 mm., 20.5 mm. to base of caudal. Naranjito, 

 Rio Chan Chan, Ecuador. Henn. 



Of this species, the only one of the subfamily found on the Pacific slope of the 

 northern half of South America, I have but a single, poorly preserved specimen. 

 Head 3.4; depth about 3; D. ?; A. 23; Scales ?; eye 3 in the head, a little greater than 

 the interorbital. 



Compressed ; dorsal and ventral outlines equally curved. Fontanels very large, 

 the frontal fontanel entirely separating the frontal bones; third suborbital having 

 only a narrow naked ridge behind it. Mouth large, the maxillary-premaxillary 

 border longer than the eye. Seven or eight premaxillary teeth, which are slightly 

 graduate ; maxillary with two small teeth (on one side at least) ; mandible with 

 about fifteen teeth, of which the first four or five are nearly equal in size, larger 

 than the premaxillary teeth, the rest rapidly diminishing in size. Origin of the 

 dorsal a little behind the middle, 12 mm. from the tip of the snout, 10.5 mm. from 

 the base of the middle caudal rays; origin of anal on vertical from origin of dorsal; 

 height of dorsal very nearly equal to length of head; pectorals extending beyond 

 the base of ventrals, ventrals beyond origin of the anal. The scales are small. A 

 weU-defined, vertical humeral spot; margin of anal dark. 



