1522 Bulletin ^7, United States National Museum. 



vertical, but convexly protuberant at angle ; buccal scales in 5 rows ; jaws 

 normally developed; supramaxillary terminating at a vertical in front of 

 orbit ; lower lip indicated by an obsolete fold, wanting toward symphysis ; 

 teetb in outer row moderately enlarged; dorsal fin slightly developed; 

 anterior spines rather slowly graduated, and the rest subequal ; longest 

 soft rays, when bent back, extending to terminal half of caudal; anal fin 

 commencing under about fourteenth dorsal spine ; spines at first rapidly 

 and then gradually increasing in length backward; longest soft rays, 

 Avhen bent back, reaching second third of caudal fin; caudal tin 4^ times 

 in extreme length, and slightly emarginated; pectoral tins reaching back- 

 ward to vertical of third anal spine, and filamentary rays of ventral tins 

 extending to fourth or tifth anal spine. Back declining rather slowly, and 

 in a gentle curve to tail, and in front of dorsal boldly decurved to fore- 

 head. Color (in spirits) yellowish orange; a rather broad black band 

 extending from postocular region across operculum and shoulder, along 

 flanks to spot at ])ase of caudal fin; back in front of dorsal with a 

 blackish spot, and under base of dorsal fin are more or less defined dark 

 areas or spots; dorsal fin dusky and immaculate, as are also the anal and 

 caudal; pectoral fins yellowish at base and dusky beyond, and the ven- 

 tral has outer rays dusky (but with edge of external lighter) and inner 

 yellowish ; Ijranchiostegal membrane below orange or yellowish, and the 

 breast slate-colored. Lake Nicaragua. (Gill & Bransford.) (halteatus, 

 belted.) 



Heros haltcatiis, (iiLL lV Branpford, Proc. Ac. Nat. Sci. Pliila. 1877, 184, Lake 

 Nicaragua. 



1915. ClfllLASOMA ROSTRATUM (Gill & Bransford). 



Depth 2^; caudal peduncle i higher at base than long. Its greatest 

 height bears to its length the ratio of 10 to 8. Head acutely pointed, and 

 snout above rectilinear. Length of snout exceeds i that of head. Inter- 

 orbital area nearly flat. Pieoperculum and cheeks very oblique. Buccal 

 scales in 6 rows. Jaws normally developed. Superior maxillary termi- 

 nates at a vertical a little neai-er eye than snout, and the articulation of 

 lower jaw is notably in advance of eye. Lips moderately developed, and 

 lower one separated by a broad frenum at middle. Dorsal fin well 

 developed; anterior spines rapidly graduated, the rest subequal; the 

 soft rays, when bent back, extend a little beyond basal third of caudal. 

 Anal fin commencing under about twelfth dorsal spine, its first 4 spines 

 rapidly increase, and its last 2 moderately; soft part, when bent back, 

 extending a little beyond l)asal fourth of caudal. Caudal enters 4* times 

 in extreme length, and is subtrnncate, but slightly emarginated in middle. 

 Pectoral fins well developed and extending about as far backward as first 

 anal rays. Ventral tins have tilamentary rays, which extend backward to 

 last anal spine. Back declines rather rapidly to tail, and in front of dorsal 

 is slightly gibbous. Color a bronzed olive, indistinctly crossed, at least 

 in the young, by 2 bands, 1 under dorsal and the other below its last rays; 

 jater these fade out more or less, leaving of the tirst only a rather indis- 

 tinct dorsal saddle under median spines, and of the second a distinct black 



