494 MEMOIRS OF THE CARNEGIE MUSEUM 



Head 3-3.25; depth 2-2.33; D. XV,10 or 11; A.III,8; lateral line 17-19 + 

 9-12 + j^|; scales 27; eye 3.5 in the head, 1.5 in the preorbital, 1.33 in the inter- 

 orbital in the larger; 3, .8, .8, respectively in the small; eye in posterior half of the 

 head, measured to the upper angle of the gill-opening. 



Dorsal profile steep, becoming more so with age, ventral profile scarcely arched; 

 maxillary not reaching to below the eye, maxillary-premaxillary border 3.25 in the 

 head in the larger. Lower lip with a frenum. Depth of caudal peduncle equal to 

 its length. 



Cheeks with four or five series of scales; preopercle naked; one to one and one- 

 half scales between the end of the lateral line and the dorsal; seven gill-rakers on 

 the lower arch; dorsal and caudal naked ; lateral line forked on the caudal. Dorsal 

 spines subequal from the fourth or fifth, the last one-half to three-fifths the length 

 of the head; dorsal and anal prolonged, sometimes reaching the end of the caudal. 

 Caudal emarginate, the outer rays sometimes a little prolonged; pectoral as long- 

 as the head or a little shorter. 



A curved bar from the nape through the eye and through the angle of the pre- 

 opercle; another bar curved backward from below the middle of the spinous dorsal 

 towards a point in front of the anus. Ends of soft dorsal and anal and middle of 

 caudal with hyaline spots. 



Cichlasoma Swainson. 



Cichlasoma Swainson, Class. Fishes, Amph., and Rept., 1839, 230 (bimaculatum) . 



Acara, part, Heckel, Ann. Wiener Mus., II, 1840, 338. 



Heros Heckel, Ann. Wiener Mus., II, 1840, 362 (restricted by Jordan and Ever- 



mann to severum). 

 Hoplarchus Kaup, Archiv fiir Naturg., XXVI, 1860, 128 (pentacanthus) . 

 Theraps Gunther, Catalogue, IV, 1862, 284 (irregularis). 

 Archocentrus Gill, Proc. Acad. Nat. Sci. Phila., 1877, 186 {centrarchus) . 

 Astatheros Pellegrin, "Cichlides," 167, in Mem. Soc. Zool. France, XVI, 1903, 



203 (heterodontus) . 

 Enjthrichthus Meek, Field Mus. Zool. Series, VII, 1907, 121. 

 Parapetenia Regan, Ann. and Mag. Nat. Hist., (7), XVI, 1905, 324 (adspersa). 



Type, Scicena bimaculata Linnaeus. 



Gills normal, gill-rakers short; lateral line well separated from the dorsals; 

 preopercle entire; mouth small, premaxillary not greatly protractile; anal with 

 more than three spines. 



