312 Memoir Sears Foundation for Marine Research 



of half-grown examples from Pensacola, Florida); Bollman, Proc. U. S. nat. Mus., 9, 1886: 462 (two large 

 ones, Escambia R., Alabama). 



Clupea chrysochlorh Meek (not of Rafinesque), Bull. U. S. Fish Coram., 14, 1894: 85 (Mulberry, Arkansas; 

 USNM 62225 A.alabamae). 



Alosa alabamae Jordan and Evermann in Evermann, Rep. U. S. Comm. Fish. (1895), 21, 1896: 203 (orig. 

 descr.; type local. Black Warrior R., Tuscaloosa, Alabama; types USNM 47689 [9] and 47690 [^]; 

 cf. A.sapidissima); Evermann and Kendall, Bull. U. S. Fish Coram. (1897), IJ, 1898: 127 (distr.); Jor- 

 dan and Evermann, Bull. U. S. nat. Mus., 47 (3), 1898: 2810, figs. 192, 192a (descr., refs.); Regan, 

 Ann. Mag. nat. Hist., (8) 18, 1916: 9 (refs., diagn.); Jordan, Evermann, and Clark, Rep. U. S. Corara. 

 Fish. (1928), 2, 1930: 43 (range, ref.). 



Alosa ohiensis Everraann, Rep. U. S. Comm. Fish. (1901), 27, 1902: figs, i and 2, $ and (^ ohiensis; figs. 3 and 

 4, (J and $ alabamae (orig. descr.; tj'pe local. Ohio R., Louisville, Kentucky; types USNM 50469; 

 di. alabamae and sapidUsima; distr.); Jordan, Evermann, and Clark, Rep. U. S. Comra. Fish. (1928), 

 2, 1930: 42 (range, ref.) ; Coker, et al., Bull. U. S. Bur. Fish (1929), 45, 1930: 169 (Keokuk, Iowa 

 191 5, 1916; influence of dam on migr.; an unused food). 



Alosa alabamae ohiensis Regan, Ann. Mag. nat. Hist., (8) 18, 1916: 9 (ref., diagn.). 



Genus Pomolobus Rafinesque 1820 



Alewives, River Herring 



Pomolobus Rafinesque, West. Rev. Misc. Mag., 2, 1820: 170; Ichthyol. Ohiensis, 1820: 38; genot)'pe by mono- 

 typy, Pomolobus chrysochloris Rafinesque. 



Generic Synonym: 



Alausella Gill, Proc. Acad. nat. Sci. Philad., Suppl., i86r : 54; Proc. Acad. nat. Sci. Philad., 1861 : 36; genotype 

 by monotypy, Clupea parvula Mitchill equals probably young of Clupea pseudoharengus Wilson. 



Characters. Body oblong, compressed. Bony scutes strong, with sharp points; a 

 sharp edge on median line of chest and abdomen. Cheek generally longer than deep, 

 about as long as deep in P. mediocris. Mouth large. Maxillary extending to or 

 beyond middle of eye. Upper jaw with a more or less definite median notch in adults. 

 Lower jaw projecting or included, its upper margin within the mouth rising more or 

 less abruptly. Teeth in jaws not entirely wanting in adults; present at least anteriorly 

 in lower jaw, though rudimentary in some species; present on median line of tongue; 

 wanting on vomer. Dorsal with 1 5-2 1 rays, the last one not produced, its origin 

 nearer to tip of snout than to base of caudal. Anal with 16—23 rays, the last one not 

 especially enlarged. Pelvic with 9 rays. Vertebr.'\e 46—55. 



Remarks. Two members of this genus, mediocris and chrysochloris, are close to the 

 American species oi Alosa in the general structures about the head, except that the lower 

 jaw projects beyond the upper one; they diflfer strongly, however, in having fewer gill 

 rakers, which do not increase in number with age (18—24 on lower limb). The other 

 two species, aestivalis and -pseudoharengus., herein recognized, agree more or less with the 

 species oi Alosa in the number of gill rakers (38—51 on lower limb) and in having the 

 lower jaw included ; they differ, however, in having much shallower cheeks, which are 

 much longer than deep, and in having the upper margin of the lower jaw rising abruptly 

 within the mouth to form a more or less obtuse angle. 



