1905.] PISHES OF THE FAMILY CICHLID.E. 163 



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. Crenicichla wallacii, sp. n. (Plate XIY. fig. 2.) 



Depth of body 5^ in the length, length of head 31. Snont as 

 long as eye, the diameter of which is 3| in the length of head, 

 interorbital width 4^. Nostril a little nearer to eye than to tip 

 of snout. Maxillary not extending to beloAv the eye ; depth of 

 pr^orbital i the diameter of eye. Anterior teeth forming 5 or 6 

 series in each jaw. 9 gill-rakers on the lower part of anterior 

 arch. Scales denticulated, except on the head, the lower parts of 

 thorax and abdomen and anteriorly above the lateral line, 64jg^ 

 57 in a longitudinal series below the lateral line, 2 between last 

 dorsal spine and lateral line, 3 between upper and lower lateral 

 lines. Lateral line 21 + 10. Dorsal XX 11 (XVIII 13), the 

 spines subequal from the ninth, the last k the length of head. 

 Anal III 7 (9). Pectoral f , ventral f 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 with 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 the species. R. Essequibo. Mr. Elirliardt. 



Dr. A. R. Wallace has made a drawing 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 natuiulist should have been 

 accidentally destroyed and thus lost to science. Dr. Wallace gives 

 the number of fin-rays as D. XYIII 13. A. Ill 9. 



8. Cbenicichla vittata. 



Crenicichla vittata Heck. Ann. Mus. Wien, ii. 1840, p. 417. 



Depth of body 4|-5 in the length, length of head 3-l-3|. 

 Diameter of eye 5 in the length of head, length of snout 2f , inter- 

 orbital width 4^-5. Nostril nearer to eye than to tip of snout. 

 Maxillary not extending to below the eye ; depth of prseorbital | 

 the diameter of eye. Anterior teeth forming 7 or 8 series in the 

 upper jaw, 5 or 6 in the lower. 9 or 10 gill-rakers on the lower 

 nart of anterior arch. Scales denticulated, except on the head and 



11-13 



the lower part of thorax and abdomen, 110-120 ^^jigs' 84-95 m a 

 longitudinal series below the lateral line, 6 between last dorsal 

 spine and lateral line, 4 between upper and lower lateral lines. 

 Lateral line 27 + 12-14. Dorsal XXIII 13-14, the spines sub- 

 equal from the sixth, the last nearly § the length of head. Anal 

 III 9 (10). Pectoral f, ventral more than half the length of head. 



