America7i Cichlid Genus Ciclilosoma. 75 



exposed ; teeth of the outer series distinctly enlarged ante- 

 riorly. Dorsal XVII-XIX 7-10, the soft fin scaly at the 

 base. Anal VIII-XII 6-9, Pectoral extending beyond the 

 origin of anal. Caudal rounded or subtruncate. 



The five species, from Guatemala and Nicaragua, are 

 probably derived from the type represented by C. facetum. 



8. Cichlosoma nigrofasciatum. 



Heros nic/rofasciatiis, Giinth. Trans. Zool, vSoc. vi. 1869, p. 4-52, pi. Ixxiv. 



%. 3. 

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



1898, p. 1525 ; Pellegr. Mem. Soc. Zool. France, xvi. 1903, p. 223 



(1904). 



Depth of body 2-2\ in the length, length of head 2|-3. 

 Snout considerably shorter than postorbital part of head. 

 Diameter of eye 2|-3^ in the length of head, interorlntal 

 width 2|-3^. Depth of praeorbital ^-i the diameter of eye. 

 Maxillary extending to the vertical from anterior margin of 

 eye ; prsemaxillary processes extending to just above anterior 

 margin of eye ; jaws equal anteriorly ; fold of the lower lip 

 not continuous ; cheek with 4 or 5 series of scales ; 7 or 8 

 gill-rakers on the lower part of anterior arch. Scales 

 28-31 YYZJ2) 2 or 2^ between lateral line and base of anterior 

 part of soft dorsal. Dorsal XVII-XVIII 8-9, commencing 

 above tlie opercular cleft, the spines subequal from the sixth 

 to the fourteenth, thence increasing to the last, which is ? 

 the length of head ; soft fin, when laid back, extending to 

 the middle of caudal. Anal VIII-X 6-8. Pectoral a little 

 shorter than the head, extending to above the third or fourth 

 anal spine ; ventral extending beyond origin of anal. 

 Caudal rounded. Caudal peduncle ^-| as long as deep. 

 Browni'^h, the body with 7 or 8 black cross-bars which extend 

 on to the dorsal fin ; a dark bar at the base of caudal. 



Guatemala. 



1-15. (43-82 mni.) types of the Lake Amatitlau. O. Salviu, Esq. 

 species. 



9. Cichlosoma spilurum. 



Heros spilurus, Giinth. Cat. Fish. iv. p. 289 (1862), and Trans. Zool. 



Soc. vi. 1860, p. 45], pi. Ixxiii. fig. 1. 

 Cichlasoma spihirwn, Jord. & Everm. Bull. U.S. Nat. Mus. xlvii. 1898, 



p. 1520; Pellegr. Mem. Soc. Zool. France, xvi. 1903, p. 222 (1904). 



Depth of body 2 in the length, length of head 3. Snout 

 as long as or longer than postorbital part of head. Diameter 



