438 Mr. C. T. Regan on the Fishes of the 



the length of head, interorbital width 2^. Depth of prse- 

 orbital a little greater than diameter of eye. Maxillary 

 extending a little beyond the nostril ; prsemaxillary processes 

 not extending to above the eye; jaws nearly equal ante- 

 riorly ; upper jaw Avith about 14 teeth in the outer series, the 

 lateral teeth decreasing in size posteriorly ; lower jaw with a 

 transverse series of 9 teeth ; fold of the lower lip not con- 

 tinuous ; cheek with 5 series of scales ; 6 gill-rakers on 

 the lower part of anterior arch. Scales 33 ^3, 2| between 

 lateral line and base of anterior rays of soft dorsal, those of 

 the thoracic region very small. Dorsal XIX 10, the spines 

 subequal from the fifth to the sixteenth, the last f the length 

 of head ; soft fin, when laid back, extending to middle of 

 caudal ; dorsal scaly at the base posteriorly. Anal VIII 7. 

 Pectoral nearly as long as the head, not extending to above 

 the anal; ventral with the outer ray elongate. Caudal 

 truncate or even slightly emarginate. Caudal peduncle as 

 long as deep. Olivaceous, obscurely spotted or marbled 

 with darker. 

 Nicaragua. 



1. (107 mm.) type of tlie Lake Managua. Capt. J. M. Dow. 



species. 



Herotilapia. 

 Herotilapia, Pellegr. M(5m. Soc. Zool. France, xvi. 1903, p. 247 (1904). 



Differs from Cichlosoma only in the dentition ; both jaws 

 with several series of compressed, incisor-like, tricuspid teeth; 

 the outer series enlarged and with the median teeth simple, 

 truncate. 



The single species is evidently closely related to C. nigro- 

 fasciatus and its allies. 



Herotilapia multispinosa. 



Hcros multispijiosus, Giinth. Trans. Zool. Soc. vi. 1869, p.4.53, pl.lxxiv. 



fig. 2. 

 Cichlasoma multispinosiim, Jord. & Everm. Bull. U.S. Nat. Mus. xlvii. 



1898, p. 1525. 

 Herotilapia multisjnnosa, Pellegr. Mem. Soc. Zool. France, xvi. 1903, 



p. 247 (1904). 



Depth of body 2^ in the length, length of head nearly 3. 

 Snout a little shorter than eye, the diameter of which is 3i 

 in the length of head, interorbital width 2^. Depth of prae- 

 orbital nearly § the diameter of eye. Maxillary not ex- 

 tending to below the eye ; prsemaxillary processes extending 

 nearly to above anterior margin of eye ; jaws equal 



