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



of eye 3 in the length of head^ interorbital width 2|-3. 

 Depth of prseorbital equal to the diameter of eye or less. 

 Maxillary not extending to below the eye ; prsemaxillary 

 processes just extending to above anterior margin of eye ; jaws 

 equal anteriorly ; fold of the lower lip not continuous ; cheek 

 with 4 or 5 series of scales ; 6 or 7 gill-rakers on the lower 

 part of anterior arch. Scales 28-30 j^, 2 or 2\ between 

 lateral line and base of anterior part of soft dorsal. Dorsal 

 XVIII-XIX 9-10, commencing above the opercular cleft, 

 the spines subequal from the sixth to the sixteenth, thence 

 increasing to the last, which is ^-§ the length of head ; soft 

 fin, when laid back, extending to middle of caudal. Anal 

 VIII-IX (X 7) 8. Pectoral as long as or longer than the 

 head, extending to above the third to fifih anal spines ; 

 ventral extending to middle of anal. Caudal rounded or 

 subtruncate. Caudal peduncle |-f as long as deep. Body 

 with 7 dark cross-bars ; a dark spot or vertical bar on the 

 base of caudal ; vertical fins dusky, sometimes spotted. 

 Guatemala. 



1-4. (75-90 mm.) types of the Lake Yzabal. O. Salvin, Esq. 



species. 

 5. (92 mm.) Rio Motagua. O. Salvin, Esq. 



10. Cichlosoma spinosissimum. 



Heros (Cichlasoma) spinoslssimus, Vaill. & Pellegr. Bull. Miis. Paris, 



1902, p. 87. 



Cichlasoma spinosissijnum (part.), Pellegr. Mem. Soc. Zool. France, xvi. 



1903, p. 224(1904). 



Depth of body 1| in the length, length of head 3. Diameter 

 of eye 3| in the length of head. Maxillary not extending to 

 below the eye; fold of the lower lip not continuous; cheek 

 with 5 series of scales ; 6 gill-rakers on the lower part of 

 anterior arch. Scales 28 y^. Dorsal XVIII-XIX 7-8, 

 the spines subequal from the fourth, the eighth \ the length 

 of head. Anal XI-XIl 7-8. Pectoral f the length of head. 

 Caudal rounded. Caudal peduncle ^ as long as deep. 

 Olivaceous, with small dark spots on the body and soft 

 vertical fins ; a dark longitudinal baud from the eye to the 

 middle of the side ; posterior part of body with -1 or 5 dark 

 cross-bars ; a dark spot on the base of caudal. 



Rio Polochic, Guatemala. 



The types (four specimens) measure from 78-100 mm. 



