eigenmann: the cheirodontin^. 



81 



Head 4-5; depth 3; D. 11; A. 23-25; scales in a median line are 34-36, of 

 which 10-11 are with pores; ten and one-half scales between dorsal and ventrals. 

 Eye 2.75 in head, very little greater than interorbital. 



Compressed, slender; dorsal and ventral profiles nearly equally curved; pre- 

 ventral area flat, with rather well-defined lateral angles, and with a nearly regular 

 median series of twelve scales; predorsal area with a median series of eleven scales; 

 occipital process extending one-sixth to one-seventh to the dorsal, bordered by 

 three scales on each side; frontal fontanel triangular, the sides of the triangle but 

 little longer than the base, about 2.5 in the length of the parietal fontanel; mouth 

 large, maxillary three-fourths as long as eye; teeth five-pointed; the median points 



Fig. 29. Cheirodon microdon Eigenmann. a, outline of side of head; h, top of iiead, sliowing fontanels; 

 c, premaxillary; d, maxillary; e, maxillary; g, dentition; h, details of interneurals and interhaemals, 6850, C. M. 



of the premaxillary projecting considerably beyond the lateral points, the three 

 median points of the teeth of the lower jaw about equal, the extreme lateral points 

 minute; seven to nine teeth in the premaxillary, two in the maxillary; teeth in 

 front of the lower jaw rapidly graduated from the third to the sixth; sides of 

 lower jaw upturned, with several (about six) minute, conical teeth; third suborbital 

 leaving but a very narrow wedge-shaped naked area behind; postorbitals covering 



