312 My. 0. T. Ui^.^i^u on the Clnpeoid Fishes 



a longitudinnl series. Dorsal 13-14. Anal 35-38. In 

 other rc'S|)('Ct3 like D. cepedlanum. 



Atlantic coast streams of Mexico south of Vera Cniz. 



Two examples, 120 to 160 mm. long, from Perez (Jiee/i-). 



3. Dorosoma chavesi. 

 Dorosoma chavesi, Meek, Zool. Publ. Columbian Mus. vii. 1907, p. 112. 



Mouth rather large, with the jaws nearly equal anteriorly, 

 the mandible nearly ^ the length o£ head and the slender 

 maxillary extemlino- to below the middle of the eye. Deptli 

 of body 24 in tlie length, length of iiead 2| to 3. Diameter 

 of eye 3 to 3^^ in length of head. 74 to 78 scales in a longi- 

 tudinal series ; ventral scutes 17-19 + 9-10. Dorsal 12-15. 

 Anal 20-30. A dark humeral spot. 



Total length 47 to 210 mm. 



Lakes Managua and Nicaragua. 



12. Nematalosa, gen. nov. 



Mouth toothless, subterminal or inferior, transverse, its 

 cleft forming an angle, maxillary slender, distally slightly 

 expanded and curved downwards ; edge of dentary reflected 

 outwards in front of extremity of maxillary; one supra- 

 maxillary. Gill-rakers slender, very numerous. Dorsal 

 13-18 ; last ray prolonged into a filament ; a scaly sheath at 

 base. Anal 18-24. Pelvics 8-rayed, below or a little in 

 advance of dorsal. Scales 44-50 in a longitudinal series, 

 14-21 in a transverse series. Veitebi?e 43 (in iV. erehi). 



Coasts and rivers of Asia and Australia from Arabia to 

 Japan and New South Wales. 



Synopsis of the Species. 



I. Second suborbital covering cheek, its anterior edge vertical and its 



lower edge borizontal and in contact with lower limb of prje- 

 operculum 1. nasus. 



II. Second suborbital with oblique antero-inferi or edge; a naked area 



above lower limb of praeoperculum. 



A. Dorsal 16-18 ; pelvics below anterior part or middle of dorsal. 



Anal 21-23 ; depth 3 in length 2. japom'ca. 



Anal 19 ; depth 2f in length 3. arabica. 



Anal 20-22 ; depth 2 to 2^ in length 4. come. 



B. Dorsal rays 13-16. Anal 18-22. 



Depth 2 to 2\ in length : eye 3^ (young) to 5 (very large 

 fish) in length of head ; pelvics below or immeliiately 

 in advance of origin of dorsal 5, ei'ehi. 



Deptb 2| to 2| in length ; eye 4 (youog) to 5 {adult) in 



length of bead ; pelvics below anterior | of dorsal . . 6. horni. 



