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Show 168 ON SOUTH-AMERICAN FISHES OF THE FAMILY CICHLID.E. [Mar. 7, thoracic region with numerous small blackish spots ; a dark spot or ocellus on the upper half of the base of caudal; fins unspotted, the dorsal sometimes with a dark margin, the ventral with the 2 outer rays dark. R. Amazon. The type of the species, from the Rio Negro, measures 350 mm. in total length; that of C. adspersa, from the Rio Guapore, 265 mm. 16. C r e n ic ic h l a jo h a n n a . Crenicichla johanna Heck. Ann. Mus. Wien, ii. 1840, p. 417. Cychla fasciata Schomb. Fish. Guiana, ii. p. 141, pi. iv. (1843). Crenicichla obtusirostris Giinth. Cat. Fish. iv. p. 305 (1862). Crenicichla johanna, var. johanna Giinth. t. c. p. 306. Crenicichla brasiliensis, var .johanna Pellegr. Mem. Soc. Zool. France, xvi. 1903, p. 383, fig. (1904). Depth of body 4-4|- in the length, length of head 3-^-3^. Diameter of eye 4|- 5| in the length of head, length of snout 3y-3f? interorbital width 2|- 3|. Nostril much nearer to tip of snout than to eye. Maxillary extending to below anterior margin of eye; depth of praeorbital the diameter of eye. Anterior teeth forming 4 or 5 series in the upper jaw, 3 or 4 in the lower. 10 or 11 gill-rakers on the lower part of anterior arch. Scales cycloid, 124-133 97-108 in a longitudinal series below the lateral line, 10 or 11 between last dorsal spine and lateral line, 6 or 7 between upper and lower lateral lines. Lateral line 26-27 + 13-14. Dorsal X X I -X X IV 16-17, the spines subequal or only slightly increasing from about the tenth, the last i the length of head. Anal III 11-12. Pectoral |-f , ventral i -| the length of head. Caudal peduncle as long as or longer than deep. Brownish; 10 or 12 dark cross-bars above the lateral line, obscure or absent in the adult; body below the lateral line sometimes with alternate light and dark undulating vertical stripes; dorsal sometimes with a dark margin and light intramarginal band. Brazil; Guiana ; Venezuela. 1. (260 mm.) Zool. Soc. 2. (325 mm.) type of C. obtusirostris. R. Capin. 3. (151 mm.) R. Cupai. 4. (285 mm.) R. Capin. Dr. E. A. Groldi. 5. Skeleton. R. Capin. Dr. E. A. Goldi. 6. (250 mm.) L. Hyanuary. Prof. A. Agassiz. E X P L AN A T IO N OF TH E PLATES. P l a t e X IV . Fig. 1. Batrachops punctulatus, p. 156. 2. Crenicichla wallacii, p. 163. 3. „ acutirostris, p. 164. P l a t e X V . Fig. 1. Crenicichla strigata, p. 165. 2. „ ornata, p. 167. |