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Show 1 9 0 5 . ] FISHES OF THE FAMILY CICHLID^. 1 5 3 anterior rays of soft dorsal. Dorsal X Y I (X Y II 8) 9, commencing above the opercular cleft, the spines not or only slightly increasing after the fifth, the last | the length of head; soft fin extending to anterior ^ of caudal. Anal III (7) 8. Soft dorsal and anal scaleless. Pectoral longer than the head; ventral extending about to origin of anal. Caudal rounded. Caudal peduncle as long as deep. Brownish, with a series of darker blotches on and above the lateral line and another more distinct series below the lateral line; a dark stripe with white edges from eye to mouth; posterior part of spinous dorsal, soft dorsal, and middle part of caudal with alternate light and dark stripes or series of spots ; anal with a blackish edge. R. Amazon; Guiana. 1. (104 mm.) type of the species. R. Essequibo. Mr. Ehrhardt. 2. C r e n a c ar a m a c u l a t a . Dicrossus mciculatus Steind. Sitzb. Ak. Wien, lxxi. 1875, p. 102; Pellegr. M6m. Soc. Zool. France, xvi. 1903, p. 170 (1904). Depth of body 3^-4 in the length, length of head a little more than 3. Snout shorter than eye, the diameter of which is 2§ in the length of head and a little greater than the interorbital width. Depth of prseorbital ^ the diameter of eye. Maxillary extending to below the eye; jaws equal anteriorly; cheek with 3 series of scales, none on the prseoperculum. Scales 26 -j, 1 between lateral line and anterior rays of soft dorsal. Dorsal X IY 9, the spines only slightly increasing after the fifth, the last more than i the length of head; soft fin extending to or beyond base of caudal. Anal III 7. Pectoral as long as the head; ventral extending beyond origin of anal, sometimes to its posterior end. Caudal rounded. Caudal peduncle longer than deep. Colour as in C. punctulata, the body with 2 series of dark blotches, a dark stripe from eye to mouth, the vertical fins with alternate light and dark spots. R. Amazon. The types described by Steindachner measure up to 60 mm. in total length. B a tr a ch o p s . Batrachops Heck. Ann. Mus. Wien, ii. 1840, p. 432. Crenicichla (part.) Giinth. Cat. Fish. iv. p. 305 (1862); Eigenm. & Bray, Ann. Ac. X. York, vii. 1894, p. 620; Pellegr. Mem. Soc. Zool. France, xvi. 1903, p. 372 (1904). Boggiania Perugia, Ann. Mus. Genova, (2) xviii. 1897, p. 148 ; Pellegr. t. c. p. 371. Body elongate, little compressed; scales moderate, ctenoid. Two lateral lines; scales of the lateral line larger than the rest. Mouth moderate or large; lower jaw projecting; maxillary exposed distally; teeth conical, in 2 or 3 series in each jaw, the outermost series enlarged, especially in the lower jaw; none of |