of the Genera Pomolobus, Brevoortia, Sfo. 303 



smooth except for a groove parallel to its anterior edge ; sub- 

 operculum tapering- upwards ; opercular margin rounded ; 

 6 branchiostegals. Lower gill-rakers of first and second 

 afches long, slender, and numerous, those of ceratobranchial 

 folding over those of epibranchial, which are curiously 

 (xpanded, T-shaped or triangular in section, appearing angu- 

 larly bent on the lower side, but not on the upper; gill-rakers 

 of third and fourth arches similarly expanded or recurved, 

 the series fitting closely to form a sieve. About 45 scales in 

 a longitudinal and 16 to 19 in a transverse series ; edges of 

 scales crenulated in the young, pectinated in the adult ; 

 transverse grooves paired, not meeting in the middle of the 

 scale, only the most posterior groove extending right across ; 

 a well-defined mid-dorsal double row of scales, comnieucino- 

 with a large postoccipital pair, extends backwards to the 

 dorsal fin ; ventral scutes with sharp-pointed keels. Dorsal 

 fin of 16 to 19 rays ; a very low basal sheath. Anal of 20 

 to 23 rays. Pelvics 8-rayed, inserted below anterior ^ of 

 dorsal. Caudal with alar scales. 



Etiimalosa dorsalis. 



Meletta senegalensis, Cuv. & Val. Hist. Xat. Poiss. xx. p. 370 (1847). 



Alausa dorsalis, Cuv. & Val. t. c. p. 418. 



Alosa pUitycephalus, Bleek. Yerh. Hell, Maatsch. Haarlem, 1862, 



Guinee, p. 123, pi. xxvi. tig. 2. 

 Clupea dorsalis, Gunth. Cat. Fish. vii. p. 438 (1868). 

 Clupta setusci, Steiiid. iSitzuiigsb. Akad. Wien, Ix. 1869, p. 311, pi. vi. 



Depth of body 2^ to 3 in the length, length of head 3 to 3? . 

 Diameter of eye 4^ to 6 in length of head. Maxillary ex- 

 tending to below middle or posterior part of eye. About 45 

 scales in a longitudinal, 16 to 19 in a transverse series ; 

 ventral scutes 16-19 + 11-13. Dorsal 16-19. Anal 20-23. 

 Pelvics below anterior ^ of dorsal. Silveiy ; back darker ; 

 tip of dorsal Hn blackish. 



West Africa. 



Numerous examples up to 30Q mm. in total length. 



7. HiLSA, gen. no v. 

 ParaJosa (non Bleek.), Eegan, Ann. Diu-ban Mus. i. 1916, p. 167. 



Distinguished from Alosa by the smooth operculum and 

 the different arrangement of the gill-rakers of the anterior 

 arch, from Etiimalosa by the normal structure of the gill- 

 rakers, and from both by the absence of alar scales on the 

 caudal tin. 



