DE. GtJNTHEE ON THE FISHES OF CENTEAL AMEEICA. 



D. 5j 



ClIORINEMUS ALTUS. 



The height of the body is contained thrice in tlie total length (without caudal), the 

 length of the head four times and one-fourth. 

 Eye rather large, its diameter being equal to 

 the length of the snout, and one-fourth of 

 that of the head. Lower jaw projecting be- 

 yond the upper. Maxillary very narrow 

 posteriorly, scarcely extending to the ver- 

 tical from the hind margin of the eye ; the 

 length of the intermaxillary is contained 

 once and three-fourths in the length of the 

 head. The infraorbital, situated above the 

 maxillary, is as broad as the bone next above 

 it ; none of these bones reach to the anterior 

 pi-seopercular ridge. Pectoral fin longer than 

 the ventral, nearly as long as the head (with- 

 out snout). Coloration uniform. 



One example, 11 inches long, has been recently sent by Capt. Dow from Panama. 



83. Chokinemus inorxatu.s. 

 Olic/oplites inornatus, Gill, Proc. Acad. Nat. Sc. Philad. 1863, p. 1(5(), 



D. 5 I ^. A. 2 



"The height of the body enters four times and two-thirds in the total length; the 

 length of the head five times and two-thirds. The upper maxillary reaches nearly to 

 the vertical from the hinder margin of the orbit ; the intermaxillary enters t\\ice and 

 one-thu-d in the head's length. The snout is a little longer than the diameter of the 

 eye ; the latter equals a quarter of the head's length. The infraorbital bones do not 

 extend to the prajoperculum ; the one above the maxillary bones is wider than the one 

 above itself, and as wide as that behind the eye. The opercular apparatus is vertical in 

 front of the pectoral, and for an equal space above. The prsoperculum is nearly 

 vertical, and its angle obliquely rounded. The width of the operculum and suboper- 

 culum in front of the lower axilla of the pectoral equals the diameter of the eye and 

 the interval between suboperculum and axil. The pectoral equals the interval between 

 its axis and the hinder border of the pupil ; the ventral is rather shorter, but its end 

 almost or quite reaches to the anus. The colour is uniform, tinged with blue above." 



One adult specimen was collected by Capt. Dow on the Pacific coast of Central 

 America. 



VOL. VI. — PART VII. 



3o 



