G8 Mr. C. T. Reo-au on the Fishes of the 



Section 1 (Cichlosoma). 



Body ovate ; scales of lateral line of the same size as those 

 above and below it ; scales of thoracic region scarcely 

 smaller than those on the side o£ the body. Mouth rather 

 smallj moderately protractile; maxillary not exposed; teeth 

 of the outer series rather small, scarcely increasiug in size 

 anteriorly. Dorsal XlV-XVl 9-11, the soft fin scaly at the 

 base. Anal IV (? V or VI) 8-9. Caudal rounded. * 



The single species, from South America, is undoubtedly 

 closely allied to Acarn portalegrensis. On the other hand, it 

 shows clear affinities with Cichlosoma facetum and its allies. 



1. Cichlosoma himaculatum. 



Scicena bimuculata, Linn. Mus. Ad. Fried, i. p. 66 (1754). 



Luhriis hhnaculatus, Linn. Syst. Nat. (ed. x.) p. 285 (1758). 



Labrus punctatus (part.), Linn. /. c. 



Lahrus punctatus, Bluch, Ausl. Fisclie, vi. p. 20, pi. ccxcv. (1792) ; 



Schneider, Block's Syst. Ichtli. p. 251 (1801). 

 Perca bimamlaia, Bloch, t. c. p. 82, pi. cccx;. 

 Cichln bimaculata, Schneider, o. c. p. 338. 

 Chromis tcenia, Bennett, Proc. Zool. Soc. i. 1830, p. 112; Storer, 



Mem. Ac. Amer. ii. 1846, p. 520. 

 Acara maryarita, Heck. Ann. Mas. Wien, ii. 1840, p. 338. 

 Acara marginata, Heck. t. c. p. 350. 

 Acara punctata, Heck. t. c. p. 3(50, 

 Acara Gronovii, Heck. t. c. p. 361. 



Cychlasoma tcenia, Gill, Ann. Lye. N. York, vi. 1858, p. 383. 

 Heros bimaculatus, Cope, Proc. Ac. Philad. xxiii. 1872, p. 254. 

 Acara (Heros) bimaculata, Steind. Sitzb. Ak. Wien, Ixxi. 1875, p. 82. 

 Astronotus (Cicklasoma) bimaculatus, Eigenm. & Bray, Ann. Ac. N. 



York, vii. 1894, p. 618. 

 Cichlasoma bitnaculatmn, Pellegr. M6m. Soc. Zool. France, xvi. 1903, 



p. 204 (1904). 



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

 Eye much nearer to tip of snout than to extremity of oper- 

 culum, its diameter 2g-4 in the length of head, interorbital 

 width 2-2f . Depth of prseorbital equal to the diameter of 

 eye or less. Maxillary extending to the vertical from ante- 

 rior margin of eye ; prsemaxillary processes extending nearly 

 to above anterior margin of eye ; jaws equal anteriorly ; 

 fold of the lower lip not continuous ; cheek with 3 series of 

 scales; 6 or 7 gill-rakers on the lower part of anterior arch. 

 Scales 25-27 ^^, 2 between lateral line and base of anterior 

 part of soft dorsal. Dorsal XIV-XVI 9-11, commencing 

 above the opercular cleft, the spines slightly increasing in 

 length to the last, which is f the length of head. Anal 

 IV (V-Vl) 8-9. Pectoral as long as the head, extending to 



