American Cichlid Genus Cichlosoina. 2;>'3 



to below the anterior margin of eye ; jaws equal anteriorly or 

 the lower shorter than the upper ; fold of the lower lip not 

 continuous; cheek with 5 or 6 series of scales; 9 gill-rakers 

 on the lower part of the anterior arch. Scales 35 j|^, 2^ 

 between lateral line and base of anterior rays of soft dorsal. 

 Dorsal XVIIT-XIX 10-11, commencing above the opercular 

 cleft, the spines subequal from the eighth to the fifteenth or 

 sixteenth^ thence increasing to the last, which is a little 

 more than ^ the length of head ; soft fin, when laid back, 

 extending to anterior ^ of caudal. Anal VII-VIII 8-9. 

 Pectoral nearly as long as the head, extending to above the 

 second or third anal spine ; ventral extending beyond origin 

 of anal. Caudal truncate or slightly emarginate. Caudal 

 peduncle nearly as long as deep. Upper half of body 

 brownish, with 5 or 6 dark cross-bars ; vertical fins with 

 dark spots. 



Lake Nicaragua. 



1. (176 mm.) type of the Lake Nicaragua. Capt. J. M. Dow. 



species. 



2. (L57 mm.) Lake Nicaragua. O. Salvin, Esq. 



o. (156 mm.) Lake Nicaragua. Smithsonian Inst. 



Sectiou 8 (Astatheros). 



Body rather deep (depth l-g^-S.l^ in the length). Upper 

 profile of snout straight, oblique. Scales of the lateral line 

 of the same size as those above and below it ; scales of 

 thoracic region considerably smaller than those on the sides 

 of the body. Mouth moderate, moderately protractile ; 

 maxillary slightly exposed ; teeth of the outer series in both 

 jaws rather small (16-22 on each side in the upper jaw), 

 well-developed laterally and only slightly increasing in size 

 anteriorly. Dorsal XI V-X VI 10-15, the soft fin more or 

 less distinctly scaly at the base. Anal V-VIl 8-9. Caudal 

 rounded, subtruncate, or slightly emarginate with rounded 

 lobi s. 



Six species from Southern Mexico, Central America, and 

 Colombia, which resemble C. bunaculatum in their gene- 

 ralized dentition. 



32. Cichlosoina Robertsoni, sp. n. 



Depth of body 2| in the length, length of head 2|. Snout 

 as long as postorbital part of head. Diameter of eye 3^ 

 in the length of head, interorbital width 3^. Depth of 

 prjeorbital nearly | the diameter of eye. Maxillary not 



