A,.:erican CicliUd Gcius Ciclilosoma. 



GO 



above the anal spines ; ventral often extending to posterior 

 end of anal. CaiKial rounded. Caudal peduncle about | 

 as long as deep. Brownish, with 8 dark cross-bars, the third 

 bearing a blotch below the lateral line ; a dark spot below 

 the posterior part of eye and another on the upper part of 

 the base of caudal ; a longitudinal band from eye to lateral 

 blotch; each scale of the lower half of the body with a light 

 spot at its base ; each scale of the posterior half of the body , 

 with a dark spot ; soft dorsal, anal and caudal spotted. 

 Brazil ; Guiana ; Trinidad. 



1-2. (72 and 83 mm.) Demerara. Dr. Hancock. 



3-5. (83-121 mm.) British Guiana. Sir R. Scliomburgk. 



C-14. (73-141 mm.) Guiana. Berlin Museum. 



15. (150 mm.) Trinidad. Zoological Society. 



16-17. (93 and 107 mm.) Babia. Dr. Wuclierer. 



18^21. (41-56 mm.) Demerara. F. G . Beckford, Esq. 



22-36. (40-92 mm.) 



37-39. (70-112 mm.) Berbice. F. G. Beckford, Esq. 



40-42. (50-105 mm.) Demerara. 



43-46. (144-156 mm.) Britisli Guiana. 



47. (180 mm.) Trinidad. F. W. Urich, Esq. 



48-52. (134-171 mm.) Trinidad. L. Guppy, Esq. 



63-54. (72 and 88 mm.) Tabatinga. Mus. Comp. Zool. 



All agree in having 4 anal spines, and the numbers 5 and 6 

 are evidently quite exceptional. 



Section 2 (Mesonauta). 



Body increasing in depth to below the posterior part of 

 the dorsal fin ; scales of lateral line of the same size as those 

 above and below it ; scales of thoracic region not very much 

 smaller than those on the side of the body. Mouth small, 

 moderately protractile ; maxillary very slightly exposed 

 distally ; teeth of the outer series distinctly increasing in 

 size anteriorly. Dor.^al XIV-XVI 10-12, the soft fin scaly 

 at the base. Anal VIII-IX 10-12. Caudal rounded. 



The single species, from South America, shows relationships 

 with C. bimaculatum and C. autochthon. 



2. Cichlosoma festivum. 



Jleros festivus, Heck, Ann. Mus. Wien, ii. 1840, p. 376. 



Heros insiynis, Heck. t. c. p. 378. 



Chromys acora, Casteln. Anim. Am. Sud, Foiss. p. 17, pi. ix. tig. 1 



(1855). 

 Mesonauta insignis, Giinth. Cat. Fisb. iv. p. 300 (1862). 

 Acara [Heros) f estiva, Steind. Sitzb. Ak. ^Vieu, Ixxxi. 1875, p. 93. 

 Mesonauta festivus, Eigenm, & Bray, Ana. Ac. N. York, vii. 1^94, 



p. 619. 

 Cichlasoma insiijne, Fellegr. M6m. See. Zool. France, xvi. 1903, p. 221 



(1904). 



