﻿REVIEW OF GENUS DOROSOMA — MILLER 



397 



C.N.H.M. 43148: 2 paratypes, 130 and 133 mm. long, from El Hule, listed by 

 Hubbs and Miller (1941, p. 235) as F. M. Nos. 4190 and 4191 (see Grey, 1947, p. 

 140). 



U.S.N. M. No. 55738: 1 paratype, 121 mm. long, from P<5rez. 



S.N.H.M. No. 9349: 1 paratype from Pdrez. 



Table 5. — Diagnostic differences in -proportional measurements between three species 



of Dorosoma, expressed in thousandths of the standard length 



[Summarized from tables 6-8. The superscripts indicate tiie number of specimens] 



Measurement 



Standard length, in mm 



Dorsal origin to tip of snout—.. 

 Pelvic insertion to tip of snout. 



Anal origin to caudal base 



Head: Length 



Depth 



luterorbital, least fleshy width 



Snout, length 



Eye, length 



Snout+eye 



Dorsal filament, length --. 



Anal fln, basal length 



Mandible, length 



Upper jaw, length 



anale 



Range 



92-149 



486-529 



409-454 



399-445 



253-294 



200-245 



65-85 



41-58 



61-76 



113-130 



252-319 



318-363 



82-99 



61-76 



Aver- 

 age 



22 124 



510 



432 



424 



270 



223 



75 



49 



70 



119 



ai 285 



338 



88 



69 



chavesi 



Range 



84-142 

 635-588 

 454-549 

 320-407 

 306-405 

 236-307 

 77-94 

 51-84 



77-102 

 136-178 

 129-192 

 235-305 

 110-165 



91-130 



»i 124 



557 



489 



so 379 



336 



262 



88 



64 



90 



153 



IS 157 



20 281 



128 



106 



smithi 



Range 



82-134 



475-528 



455-494 



362-397 



278-321 



216-255 



66-93 



39-61 



62-77 



115-136 



131-239 



247-309 



90-104 



72-89 



Aver- 

 age 



"107 



602 



476 



376 



297 



235 



75 



49 



70 



125 



186 



272 



96 



79 



The following specimens are all from the Rio Usumacinta Basin in 

 Guatemala and along the Mexican-Guatemalan border. The local- 

 ities for the Guatemalan material are sho^\^l on a map by Hubbs 

 and van der Schalie (Goodrich and van der Schalie, 1937). 



U.S.N. M. No. 61252: 1 specimen, about 256 mm. long, collected in 1900 by 

 E. W. Nelson and E. A. Goldman at Monte Cristo, Tabasco, Mexico (see Ever- 

 mann and Goldsborough, 1902, p. 149). 



U.M.M.Z. No. 143377 and U.S.N. M. No. 133097: 8 specimens, 28 to 190 mm. 

 long, collected on April 23, 1935, by Carl L. Hubbs and party, about 2 miles 

 above Sayaxch6, Pet^n, Guatemala. 



U.M.M.Z. No. 143378: 27 specimens collected April 19, 1935, by Hubbs 

 and party, in the flooded mouth of the Arroyito Jolomdx, opposite El Cambio, 

 Pet6n; this stream is tributary to the Rio de la Pasi6n. 



U.M.M.Z. No. 143379: 2 specimens, 118 and 125 mm. long, collected on 

 April 22, 1935, by Hubbs, van der Schalie, and Taintor in Arroyo San Martin, 

 near its mouth in Rfo de la Pasi6n, Pet^n. 



U.M.M.Z. No. 144256: 5 specimens, 233 to 254 mm. long, collected March 

 17, 1935, by Hubbs and van der Schalie in Laguna de Yaldc, in course of Rfo 

 San Pedro, about 6 leagues by river eastward from El Paso Caballos, Pet6n. 



U.M.M.Z. No. 144257: 2 specimens from same locality as preceding. 



Range. — From the Rio Papaloapdn in southern Veracruz and Oaxaca 

 southward in the Atlantic drainage to the Rio Usumacinta Basin, 

 northern Guatemala, from which it had been recorded previously by 



