ANNOTATED LIST OF THE SPECIES 233 
Head 3.5-3.8; depth 2.2; D. 10-11; A. 30-82;scalation 4.5-5, 32-35, 4.5-5.5: 
eye 2.3-2.7; interorbital 2.3-2.5. 
Deep, very compressed, dorsal and ventral profiles about equal, concave over 
eye, ventral with very uniform curvature. Predorsal region sharply ridged and 
covered with a median series of scales, 10-12, bent saddlewise. Occipital process 
rather erect, with sides curved inward, about equal to eye; a median series of scales, 
about 9, not so sharply ridged, separating dorsal and adipose fins, and over the short 
caudal peduncle a more rounded series of about 4-6; preventral well rounded; post- 
ventral trenchant, keeled, with few or no median scales. 
Dorsal fin but shghtly notched into profile, about equal to head; its origin two 
scales in front of vertical from anus and about equidistant from snout and base of 
upper caudal rays; pectoral smaller by about a pupillary diameter, reaching to end 
of the first fourth of the ventral fins; ventrals smaller by about the diameter of the 
eye, but reaching to within less than two scales the origin of the anal; anal exceeds 
the head length by about the diameter of the eye, its rays moderate in length, the 
first about double the last, its origin on the vertical from the last dorsal ray; caudal 
moderately furcate. 
Premaxillary teeth four, the third weak, near the second, and out of line; six 
teeth in the second series; four mandibular teeth, larger, and several smaller. 
Scale rows even and rather uniform in size; scales entire, faintly rayed, with 
scattered chromatophores. Ground color in aleohol a rusty brass, brighter and 
more uniform than in Bario steindachneri, and less dusky dorsally; nine or ten longi- 
tudinal, mahogany-colored stripes, strongest near lateral line, more interrupted 
and shorter both dorsally and ventrally; stripes follow the middle of the scale-rows, 
that of the lateral line broken into a series of equality-signs; base of membrane 
between anal rays strongly pigmented and somewhat concealed by a sheath of 
scales; elsewhere the fins only slightly pigmented, especially along rays, and on the 
middle of the caudal fin; faint trace on some specimens of humeral and caudal spots. 
279. MoENKHAUSIA COMMA Eigenmann 
Moenkhausia comma Eigenmann, 1908, Bull. Mus. Comp. Zool., LIT, 102, two, Cudajas; 
Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 437; 
Eigenmann, 1917, Mem. Mus. Comp. Zool., X LITI, 1, 77, pl. vi, fig. 2. 
Maranon basin and Cudajas, Brazil 
15879 and 15880, 2, 67 and 49 mm., brook, Iquitos, Allen, September, 1920. 
Known from the above four specimens and two localities. 
€ 
280. MOENKHAUSIA CRISNEJAS Pearson 
Moenkhausia crisnejas Pearson, in Eigenmann and Myers, 1929, Mem. Mus. Comp. Zool., XLIII, v, 
suppl., 524, Paipay, Rio Crisnejas; 
Pearson, 1937a, Proc. Cal. Acad. Sci., (4), X XIII, 91. 
