Jordan and Evennatm. — Fishes of North America. 1515 



ee. Depth of body less than h its length, 2^ to 3 in length. 



BALTEATUM; ROSTRATUM ; MELANOPOGON ; MELANCRUM; 

 NEBULIFEEDM; LENTIGINOSUM ; DEPPII, 1914-1920. 



Aec'HOCENTRUS (apxos, anus ; Kivrpov, spine) : 

 aa. Anal fin very long, its spines 10 or 11 in number; depth about J length. 



/. Anal fin with 7 soft rays. nigeofasciatuM; MULTISPINOSUM, 1921; 1922. 



ff. Anal fin with 9 soft rays. centeaechus, 1923. 



Subgenus CICHLASOMA. 

 1899. CICHLASOMA UECTAMJULAUK (Sttiudaoliner). 



Head 3^ ; depth 29. D. XVI, 13 ; A. IV, 11 ; scales 33-21 ; eye Ij in head, 

 2 in suout ; 7 series of scales on cheek. Lower lip interrupted ; outer teeth 

 large, somewhat canine-like, their tips brown ; maxillary reaching front 

 of eye; premaxillary moderately protractile; profile depressed before eye, 

 which is m the middle of length of head ; back considerably arched ; sub- 

 orbital deep, 1^ times eye. Dorsal spines rather low and strong; soft 

 dorsal and anal moderately high and pointed ; ventrals longer than pec- 

 toral, 3| in head; anal sjiiues graduated; soft dorsal and anal with small 

 scales at base; caudal rounded. Color dark brown ; a narrow brown ver- 

 tical streak on each scale iiosteriorly ; abroad blackish band beginning 

 behind the eye, running backward along the body to opposite first soft ray 

 of anal, then turning abrujitly upward to base of dorsal, forming a right 

 angle; a large black blotch at base of caudal; soft dorsal, anal, and cau- 

 dal with alternate rows of yellow and dirty blue spots on the membranes. 

 Fins mostly bluish, dotted with black. Length 7i inches. Mexico. (Steiu- 

 dachner.) Not seen by us. (recto?j(/(f7«ris, right-angled.) 

 Aeara rectangularis, Steindachnee, C'hromiden Mejicos, 1, 1864, Mexico. 



1900. CICHLASOMA BAUTOXI (Bean). 



Head 2i; depth 2^. D. XIV, 11; A. IV, 9; eye 4i to 5i in head, or 2 in 

 snout; interorbital width 11 in snout; scales .5-34-11. Larger examples 

 with nape strongly arched. Mouth very oblique; lower jaw projecting, 

 maxilla not reaching vertical from front of eye. Length of upper jaw 

 I that of head. Teeth in jaws; frenum of lower jaw distinct (in tyjie 

 specimens) in bands, outer series much enlarged and brown at tips; head 

 of vomer much enlarged, but toothless; palate without teeth. Scales 

 on cheek in about 6 series. The dorsal beginning over gill opening, first 

 spine verj- short, second somewhat longer, length of spines gradually 

 increasing backward, last and longest one nearly ^ length cf head ; longest 

 soft rays (third and fourth) nearly A as long as head; spines of dorsal 

 rather slender; anal origin nearly under beginning of soft dorsal; fourth 

 anal spine nearly | as long as head; longest anal ray (fourth) more than 

 i as long as head; least depth of tail equals length of snout; middle caudal 

 rays slightly longer than longest anal ray; pectoral nearly reaching to 

 above origin of anal, and ventral reaching to vent; lateral line inter- 

 rupted under fourth soft ray of dorsal and begins on median line of tail 

 at a distance below upper line a little greater than diameter of eye. Color 

 puri)li8h brown ; from head to tail a broad dark baud, more or less broken 

 up into separate blotches, the last of which is very distinct at base of tail; 



