178 MALACOrTERTGII. 



2. Dorosoma anale. 



Dorosoma anale, Meek, Publ. Columbian Mus., Zool. v. 1901, p. 93, fig. 26'. 

 Uab. Mexico, Otopa and Rio Papaloapam in Vera Cruz ^. 



Total length 300 mm. 



3. Dorosoma exile. 



Dorosoma cepedianum exile (Jord. & Gilb.^ 1882), Jord. & Everm. Bull. U.S. Nat. Mus. xlvii. 1890, 



p. 416'. 

 Dorosoma exile, Meek, Publ. Columbian Mus., Zool. v. 1904, p. 94 ". 



Hah. Coasts and rivers of Texas ^ and Tamanlipas'^. 

 Total length 300 mm. 



4. Dorosoma petenense. 



Cliatoessus petenensis, Giinth. Cat. Fish. vii. p. 408 (1868) '. 



Dorosoma petenense, Jord. & Everm. Bull. U.S. Nat. Mus. xlvii. 1896, p. 417 ^ 



Depth of body 2^ to 3 in the length, length of head 31. Jaws equal anteriorlj- ; maxillary extending to 

 below anterior 1 or | of eye. 40 to 43 scales in a longitudinal series. Dorsal 14-15 ; origin above or 

 slightly in advance of the vcntrals. Anal 21-24. Pectoral nearly reaching the ventral. Silvery, 

 a dark humeral spot. 



Hah. Guatemala, Lake Peten ^ {Salvia). 



Here described from the types, four specimens, 70 to 90 mm. in total length. 



2. SIGNALOSA, Everm. & Kendall, 1898. 

 Signalosa, Jord. & Everm. Bull. U.S. Nat. Mus. xlvii. 1900, p. 2809. 

 A single species. 



1. Signalosa mexicana. 



Cliatoessus mexicanus, Giintli. Cat. Fish. vii. p. 409 (1868) \ 



Dorosoma mexicanwn, Jord. & Everm. Bull. U.S. Nat. Mus. xlvii. 1896, p. 416 ^ 



Hi(jnalosa atchafalaya, Everm. & Kendall, Bull. U.S. Fish. Comm. 1897, p. 127 (1898) '; Jord. & 



Everm. t. c. 1900, p. 2809, fig. 184 '. 

 Siynalosn mexicana, INIeek, Publ. Columbian Mus., Zool. v. 1904, p. 94'. 



Depth of body 2'jr to 3 in the length, length of head 3 to 34. Jaws equal anteriorly ; maxillary extending to 

 below anterior ;| or j of eye. 40 to 42 scales in a longitudinal series. Dorsal 13-14 ; origin immediately 

 behind the base of the ventrals. Anal 24-2.5. Pectoral extending to or a little beyond the base of 

 ventral. Silvery, a dark humoral spot. 



ilah. Atlantic Coast streams of the Southern United States and Mexico : 



United States, ^Mississippi ■* and Louisiana "" "* ; Mexico ^ {Salle), Valles in 

 San Luis Potosi ■' ; Rio Papaloapam in Vera Cruz ^ {Meek). 



Here described from three specimens, 90 to 100 mm. in total length, including the 

 types of the species. S. atchafalayce is described and figured as having the origin of 

 the dorsal above the ventrals, but it seems to be the same as S. mexicana. 



