of the Genera Pomolobus, Brevoortia, ctr. 311 



11. DOROSOMA, Rafin. 1820. 



Ichth. Oliiensis, p. 3V). 



Chatoexma (part.), Cuv. Reirne Anira. ed. 2, ii. p. 320 (1829); Giintb. 



Cat. Fish. vii. p. 4()(5(1S0S). 

 Chatoessus, Cuv. & Val. Hist. Xat. Poiss. xxi. p. 94 (1848). 



IMouth subtermiiial oi' inferior ; maxillary narrowed dis- 

 tally ; anterior supramaxillary absent. Gill-rakers .slender, 

 ve) y numerous. Dorsal 12-15 ; last ray produced into a 

 filament. Anal 26—38. Pelvics 8-rayed, in advance of 

 dorsal. 55 to 80 scales in a longitudinal series. Vertebrae 50. 



Atlantic coast and rivers of North and Central America. 



1. Dorosoma cepedianum. 



Meqalops cepediana, Le Sueur, Journ. Acad. Philadelphia, i. 1818, 



p. 361 . 

 Clupea heteriira, Eafiiiesque, Amer. Monthly Mag". 1818, p. 354. 

 Dorosoma notafn, Ratinesque, Ichth. Ohiensis, p. 39 (1820). 

 Chatoessus ellijjiicus, Kirtlaud, Rep. Zool. Ohio, p. 109 (1839). 

 Dorosoma wsoctabilis, Abbott, Proc. Acad. Philadelphia, 1860, p. 365. 

 Chatoessus cepedianus, Giinth. Cat. Fish. vii. p. 409 (1868). 

 DorosoDia cepediatium, Jord. & Everm, Bull, U.S. Xat. Mus. xlvii. 



1896, p. 416, and 1900, fio-. 183. 

 Dorosoma cepfdianum exile, Joid. & Everm. I. c. 

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



Month small, subterminal or inferior; maxillary extendin*^ 

 to below anterior ed<^e of eye.- Depth of body 2 to 3 in the 

 lenf^ti), length of head 3| to 4^. Diameter of eye 4 to 5 in 

 length of head. 55 to 65 f^cales in a longitudinal serie.«, 21 to 

 29 in a transverse series ; ventral scutes 17-19 + 10—13. 

 l)or&al 13-15. Anal 30-34. Pelvics inserted in advance of 

 origin of dorsal. A dark humeral spotj most prominent in 

 the young. 



Cape Cod to Mexico, entering- rivers. 



Here described from five specimens, 180 to 260 ram. lono-, 

 from Virginia, Illinois, and Texas. In these the body is 

 deeper (depth 2 to 2\ in the length) in the examples from 

 Virginia than in those from Illinois and Texas (depth 2f to 

 3 in the length); but in young specimens this ditference is 

 isot apparent, the depth being about ^ of the length in both 

 forms. 



2. Dorosoma anale. 

 Dorosoma atiale, Meek, Zool. Publ. Columbian Mus. v. 1904, p. 93 fio-. 

 Depth of body 2§ to 3 in the length. About 70 scales in 



