CLTJPEIDJ5. 379 



length. Eyes diameter f- of length of head. Body strongly 

 compressed. Fins dorsal arises rather nearer to base of caudal 

 than to snout, and rather behind the origin of the ventrals ; the 

 anal has its last two rays detached. Lower lobe of caudal the 

 longer. Scales anterior to the ventral fin there are 10 or 11 ser- 

 rated scales, and 7 or 8 posterior to it. Colour silvery, with a 

 light band. 



Hub. Orissa and Bengal. Rarely attaining above 2 inches in 

 length . 



3. Genus PELLONA, Cuvier & Valenciennes. 

 Syn. IHsha, Gray ; Platygaster, Swainson. 



Brartchiostegals six. Body strongly compressed, the thoracic 

 and abdominal edges serrated. Mouth of moderate size. Upper 

 jaw generally emarginate, and shorter than the lower. Fine sharp 

 teeth in the jaws, palatines, aud pterygoid bones, also on the 

 tongue, but none on the vomer. Dorsal fin small, median. Veii- 

 trals small, inserted more in front than the dorsal ; anal elongate. 

 Scales large or of moderate size, rarely small. 



Owing to individual variation, species of this genus are difficult 

 to distinguish. 



Geographical Distribution. Tropical parts of the Atlantic and 

 Indian Oceans, and some Indian rivers. 



Synopsis of Indian Species. 



A. Dorsal fin almost or entirely in advance 



of the anal. 



. Occipital ridges subparallel behind. 

 L. tr. 15-16. Height of body 3 to 4 



in total 1. P.filigera, p. 380. 



L. tr. 16. Height of body 4J to 4 in 



total 2. P. elongata, p. 380. 



L. tr. 12-13. Head 5, height of body 4 



to 4J in total 3. P. motius, p. 381. ' 



L, tr. 13-14. Head 4$, height of body 



31 to 3 in total 4. P. indica, p. 381. 



b. Occipital ridges converging behind. 

 L. tr. 14. Head 4|, height of body 4J 



in total. Scutes 23 before ventrals. . 6. P. ditchela, p. 381. 

 Scutes 13 before ventrals 6. P. Jioevenii, p. 382. 



B. Dorsal fin situated entirely or partially 



over the anal. 



L. 1. 43-44, L. tr. 14-15 7. P. brachysoma, p. 382. 



L. 1. 48-50, L. tr. 14-15 8. P. megaloptera, p. 382. 



L. 1. 48, L. tr. 10 9. P. sladeni, p. 383. 



L. 1. 70 10. P. leschenaultit, p. 383. 



