oj the Qenera Pomolobus, Bre^roortia, c^c. 299 



2. Alosa, Cliv. 1829. 



Regne Animal, ed. 2, ii. p. 319 ; Regan, Ann. & Mag. Nat. Hist. (8) 

 xviii. 1916, p. 6. ° 



North Atlantic and ^lediterranean. 



In mj revision five species and six subspecies were 

 recognized. 



3. POMOLOBUS, Rafin. 1820. 



Ichth. Ohiensis, p. 33 ; Jord. & Everni. Bull. U.S. Nat. Mus. xlvii. 

 1896, p. 424. 



Distinguished from Alosa by the prominent lower jaw, 

 with its tip not include i. 

 Western North Atlantic. 



Si/nopsis of the Species. 



I. Lower jaw strongly projecting; 20 to 25 gill-rakers on lower part 



of anterior arch. 



Anterior teetli persistent; maxillary extending to 

 below posterior part of eve ; caudal peduncle 

 longer than deep ... 1. chri/sochloris. 



Jaws toothless ; maxillary extending to below 



middle of eye ; caudal peduncle as long as deep. 2. medioeris. 



II. Lower jaw a little projecting ; 40 to oO gill-rakers on lower part of 



anterior arch. 



Depth 3 1, head 4§ in the length; eye 4| to 5 in 



head (in specimens of 220-260 mm.) 3. cestivalis. 



Depth 3, head 4 to 4^ in the length ; eye Sg to 4 in 



head (in specimens of 220-260 mm.) 4. pseudoharengus. 



1. Pomolohus ehri/sochloris. 



Pomolobns chn/snchloris (Rafin. 1820), .lord. & Everm. Bull. U.S. Nat. 

 Mus. xlvii. 1896, p. 425, and 1900, fig. 187. 



Depth of body 3f in the length, length of head 4. Snout 

 longer than diameter of eye, which is 6 in lengtji of head; 

 maxillary extending to below posterior part of eye; lower 

 jaw strongly projecting; small conical teeth persistent in 

 prsemaxillaries and anterior part of lower jaw; 23 gill-rakers 

 on lower part of anterior arch. 56 scales in a longitudinal 

 series, 17 in a transverse series; ventral scutes 21-1-15. 

 Dorsal 18. Anal 18. Pelvics a little in advance of middle 

 of dorsal. Caudal peduncle longer than deep. Silvery; 

 back darker. 



Mississippi and southern coast of U.S.A 

 A single specimen, 280 ram, long, from Pensacola. 



20* 



