24 ACANTHOPTERYGII. 
B. Dorsal spines subequal from the fifth or sixth or increasing in length throughout. 
1. D. XIV-XV 12-15. A. V-VI 8-9. 11 gill-rakers on the lower part of anterior arch ; 
snout not longer than postorbital part of head. 
Pectoral as long as the head ; depth of body 14 in its feng last dorsal 
spine 2 the length of head; caudalrounded. . . . . 29. macracanthus. 
Pectoral a little shorter than the head; depth of body 2 in its length ; last 
dorsal spine 2 the length of head (a little more in the young) ; caudal 
subtruncate . 1 6 ee ee ee ee ee ew we es 80. heterodontum. 
2,.D. XVI 11. A. V 8-9. 12 gill-rakers on the lower part of 
anterior arch; snout longer than postorbital part of head ; 
pectoral extending nearly to above origin ofanal. . . . . « 81. altifrons. 
3. D. XVI-XVII 11-12. A. VII 8-9. 
a. Pectoral extending to above the last anal spine; 12 or 18 gill- 
rakers on the lower part of anterior arch; snout longer than 
postorbital part of head . . . . . . 2. e « . . 82. rostratum. 
b. Pectoral extending to above the third or fourth anal spine. . 
12 gill-rakers on the lower part of anterior arch; caudal slightly 
emarginate, with rounded lobes . . . . . . . . . 83. margaritiferum. 
9 or 10 gill-rakers on the lower part of anterior arch ; caudal 
rounded. 2.0.0. ee eee ee ee ee 84, cttrinellum. 
II. Lips exceptionally thick; anterior pair of teeth in the upper jaw strongly enlarged ; 
two anterior pairs of teeth in the lower jaw enlarged and subequal. 
D. XVII 11-12. A. VII-VIII 8-9. Pectoral extending to above the third to fifth anal 
spines. 
A. Lips subnormal, scarcely produced medianly. . . . . . . . 85. erythreum. 
B. Each lip produced medianly as a long fleshy flap. 
Length of head nearly 3 in the length of the fish ; 9 gill-rakers on the lower 
part of anterior arch... . . . . 86. lobochilus. 
Length of head 23 to 22in the length of the fish ; W or rie gill. rakers on the 
lower part of anterior arch «ww wee ee ee ee OM, labiatum. 
27. Cichlosoma robertsoni, Regan, 1905. (Tab. III. fig. 1.) 
Cichlosoma robertsoni, Regan, Ann. Mag. N. H. (7) xvi. 1905, p. 239. 
Hab. Brimsu Honpuras, Stann Creek (obertson). 
28. Cichlosoma longimanus, Giinth., 1869. 
Cichlosoma longimanus, Regan, Aun. Mag. N. H. (7) xvi. 1905, p. 240. 
Hab. Laxe Nicaracva (Salvin). 
29. Cichlosoma macracanthus, Giinth., 1864. (Tab. V. fig. 1.) 
Cichlosoma macracanthus (part.), Regan, Ann. Mag. N. H. (7) xvi. 1905, p. 241. 
Hab. Gouaremata, Huamuchal and Chiapam (Salvin). 
