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Show 280 MR. G. A. BOULENGER ON FISHES COLLECTED [Mar. 1, 1. P. suborhitalis, C. & V. 3. P. nasus, Kner 4. P. hilarii, Rbdt 5. P. affinis, Stdr J). 11 12 11 11 12 A. 9 9 9 9 8 P. 16 16 15 15 12 L. lat. 37 37 36-38 38 44-45 Mand. teeth. 3-3 3-3 3-3 2-2 2-2 Height of body contained in total length. More than six times. Less than six times. >> 21. CHARACIDIUM FASCIATUM, Rhdt. Characidium fasciatum, Reinh. Overs. Vidensk. Forh. 1866, p. 56, pl. ii. figs. 1, 2. D. 11. A. 8. V. 9. L. lat. 36-37. L. transv. -£. The height of the body equals the length of the head, and is contained four times and one third to four times and three fifths in the total length (without caudal). Nasal openings widely separated from each other, as in the types (one of which, presented by Prof. Reinhardt, is in the British Museum)1. Suboperculum rather strongly produced and angular posteriorly. Snout and eye equal in length, measuring about one fourth the length of the head. Origin of the dorsal a little nearer the adipose fin than the end of the snout. Pectorals extending to the base of the ventrals, which do not reach the anal. Brownish (probably hyaline in life), with a broad silvery band along the lateral line, and more or less distinct traces of ten or eleven dark transverse bands on the body and tail; a purplish band across the base of the six posterior dorsal rays, a small round blackish spot on the base of the caudal, at the termination of the silvery lateral band. Total length 87 millim. Four specimens from Sarayacu. Dr. Steindachner (Sitzungsb. Ak. Wien, lxxxvi. 1882, p. 78) mentions C. fasciatum from Canelos, and describes, from the same locality, a new species, 0. purpuratum (C. etheostoma, Cope ?), of which I am sorry to find no specimens. 22. LEPORINUS STRIATUS, Kner. Canelos. 23. PlABUCINA ELONGATA, sp. n. (Plate XXIII. fig. 2.) Piabucina unitaniata (non Giinth.), Steind. Denkschr. Ak. Wien, xlvi. 1883, p. 41. D. 10. A. 12. V. 8. L. lat. 30. L. transv. 8. 1 Steindachner's statement in his description of C. fasciatum (Sitzungsb. Ak. Wien, lxxiv. 1877, p. 559), " Entfernung der Narinen von einander gering," is somewhat surprising. |