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Show 1 9 0 5 . ] FISHES OF THE FAMILY CICHLIIXE. 1 6 3 lateral line white with a blackish edge ; vertical fins grey, unspotted, with dark edges. Rio Negro. The type measures 225 mm. in total length. 7. C r e n ic ic h l a avallacii, sp. n. (Plate X IV . fig. 2.) Depth of body 5^ in the length, length of head 3i. Snout as long as eye, the diameter of which is 3| in the length of head, interorbital width 4 j. Nostril a little nearer to eye than to tip of snout. Maxillary not extending to below the eye ; depth of preeorbital i the diameter of eye. Anterior teeth forming 5 or 6 series in each jaw. 9 gill-rakers on the loAver part of anterior arch. Scales denticulated, except on the head, the loAver parts of thorax and abdomen and anteriorly above the lateral line, 64j-g 57 in a longitudinal series below the lateral line, 2 betAveen last dorsal spine and lateral line, 3 between upper and lower lateral lines. Lateral line 21 + 10. Dorsal X X 11 (X V I II 13), the spines subequal from the ninth, the last \ the length of head. Anal III 7 (9). Pectoral f , ventral the length of head. Caudal peduncle longer than deep. Brownish ; a dark stripe from snout through eye to extremity of operculum, continued faintly along the side ; dorsal and anal Avitli a blackish marginal stripe ; caudal with obscure cross-bars and with a dark spot on the upper part of its base. R. Essequibo ; R. Negro. 1. (85 mm.) type of tlie species. R. Essequibo. Mr. Ehrhardt. Dr. A. R. Wallace has made a draAving of a fish of about the same size as the one described above and evidently of the -same species, which he obtained in the Rio Negro in 1851. It was a great misfortune that the magnificent collection of Fishes of the Rio Negro made by the celebrated naturalist should have been accidentally destroyed and thus lost to science. Dr. Wallace gives the number of fin-rays as D. X V I I I 13. A. I l l 9. 8. C r e n ic ic h l a v it t a t a . Crenicichla vittata Heck. Ann. Mus. Wien, ii. 1840, p. 417. Depth of body 4|-5 in the length, length of head 34-3^. Diameter of eye 5 in the length of head, length of snout 25-, inter-orbital width 4^-5. Nostril nearer to eye than to tip of snout. Maxillary not extending to beloAv the eye ; depth of prseorbital | the diameter of eye. Anterior teeth forming 7 or 8 series in the upper jaAV, 5 or 6 in the loAver. 9 or 10 gill-rakers on the lower part of anterior arch. Scales denticulated, except on the head and the loAver part of thorax and abdomen, 110-120 11_13 84-95 in a longitudinal series beloAv the lateral line, 6 between last dorsal spine and lateral line, 4 between upper and loAver lateral lines. Lateral line 27 + 12-14. D or sal X X I I I 13-14, the spines subequal from the sixth, the last nearly 3 the length of head. Anal I II 9 (10). Pectoral ventral more than half the length of head. |
