﻿398 



PROCEEDINGS OF THE NATIONAL MUSEUM 



Hubbs and Miller (1941, p. 234). The single, large adult from the 

 Kio Usumacinta at Monte Cristo (U.S.N. M. No. 61252), Tabasco, 

 was misidentified by Evermann and Goldsborough (1902, p. 149) as 

 D. cepedianum exile, but was properly referred to anale by Meek 

 (1904, p. 93). 



Table 6. — Proportional measurements of Dorosoma anale, expressed in thousandths 



of the standard length 



[Superscripts preceding measurements indicate the number of specimens. For convenience, measurements 

 of the holotype are given separately but are included in the range and average of the 22 adultsi 



Measurement 



Standard length, in mm 



Dorsal origin to tip of snout-.. 

 Pelvic insertion to tip of snout 



Anal origin to caudal base 



Body: 



Greatest depth... 



Greatest width 



Head: 



Length 



Depth 



Width 



Interorbital, least fleshy width 



Snout, length 



Eye, length 



Snout + eye 



Dorsal filament, length. 



Dorsal fin: 



Basal length-- 



Depressed height.. 



Anal fin: 



Basal length-- 



Height 



Pectoral fin, length 



Pelvic fin, length 



Lower caudal lobe, length 



Caudal peduncle, least depth. . 



Mandible, length _ 



Upper jaw, length 



Holo- 

 type, 

 C. N. 

 H. M. 

 4637 



145 

 529 

 445 

 427 



394 

 101 



284 



230 



125 



82 



41 



69 



L20 



307 



121 

 227 



334 



115 

 208 

 126 



103 

 90 

 71 



Large adults (8) i 



Range 



154-190 

 499-526 

 402-423 

 415-457 



339-386 

 86-113 



231-261 

 189-222 

 99-116 

 64- 78 

 39- 51 

 56- 69 

 100-114 

 ' 278-314 



114-133 

 208-241 



329-369 

 95-111 

 195-211 

 109-123 

 5 272-295 

 96-107 

 74- 84 

 61- 69 



174 

 510 

 413 

 435 



358 

 93 



248 

 220 

 109 

 70 

 46 

 03 

 108 

 293 



122 

 228 



348 

 106 

 203 

 118 

 289 

 101 

 80 

 65 



Adults (22) 2 



Range 



92-149 

 486-529 

 409-454 

 399-445 



347-405 

 84-116 



253-294 

 200-245 

 107-131 

 65- 85 

 41- 58 

 61- 76 

 113-130 

 252-319 



111-134 

 214-247 



318-363 



18 102-118 

 194-223 

 115-130 

 s 277-331 

 89-109 

 82- 99 

 61- 76 



Aver 



124 

 510 

 432 

 424 



366 



270 



223 



115 



75 



49 



70 



119 



285 



124 

 230 



338 

 111 



207 

 125 

 304 

 102 



Young (5) 8 



Range 



28- 83 



488-505 

 447-525 

 318-405 



308-387 

 * 82-104 



281-357 

 229-289 

 114-151 

 68- 86 

 46- 63 

 79-103 

 132-168 

 < 89-233 



106-125 

 189-229 



257-345 

 < 107-121 

 202-220 

 122-136 

 3 294-313 

 83-103 

 98-143 

 75-100 



Aver- 



62 

 526 

 477 

 398 



348 

 94 



311 



256 



126 



76 



54 

 90 

 148 

 185 



115 

 215 



296 

 115 

 211 

 131 

 304 



93 

 116 



85 



'Based on C.N.H.M. Nos. 4681 and 4708; U.M.M.Z. No. 143377; and U.S.N.M. No. 133097— from 

 Mexico and Guatemala. 



2 Based on material from throughout the range of the species. 



3 Based on C.N.H.M. Nos. 3787, 4681, and 14628; and U.M.M.Z. No. 143377— from Mexico and Guate- 

 mala. 



DOROSOMA CHAVESI Meek 



Dorosoma chavesi Meek, 1907, p. 112 (original description; type locality, 

 Laguna Jenfcero, between Lake Managua and Lake Nicaragua, Nicaragua). 



This is the southernmost species of the genus in the Atlantic drain- 

 age and is known only from the basins of Lakes Managua and Nic- 

 aragua, Nicaragua. 



Diagnosis. — A Dorosoma with 44 to 47 (usually 46) vertebrae, 72 

 to 83 lateral scales, 48 to 58 scales around the body, 12 to 14 (usually 



