EXPLANATION OF PLATE IV. 



Chaudhurio caudata, gen. et sp. nov. 



Fig. 1. — Head and foreqiiarters of type-specimen as seen from the left 

 side, X 9. 



,, 2. — The same from below. The right operculum has been raised 

 slightly to show the base of the pectoral fin. 



,, 3. — Upper jaw from below, x 15. e=ethmoid : m==maxillary : 

 1)= vomer. 



„ 4. — Lower jaw from above, x 15. 



,; 5. — Slightly obHque anterior view of the atlas vertebra, x 25. 



^^ (j_ — ObHque lateral view (from the right side) of the second ver- 

 tebra, X 25. 



., 7. — Lateral view of a trunk vertebra, X 22-5. 



^^ 8. — Lateral view of a caudal vertebra, x 44. 



^^ 9^ — Ripe egg viewed as a solid object, X 10. 



\Q — The same viewed by transmitted light after staining with 

 borax carmine, clearing with oil of cloves and mounting 

 in Canada balsam. 



Barilius auropurpureus , sp. nov. 



Fig. 11. — Early post-larval stage in which the tail is not yet forked 

 and the dorsal fin undifferentiated, X 6. 



„ 12.— A later stage, x 5. 



Microrasbora nibescens, gen. et sp. nov. 

 Fig. 13.— Right pharyngeal bone, X 15. 



Microrasbora erythromicron, sp. nov. 

 YiQ, 14.— Left pharyngeal bone, X 25. 



Sawbwa resplendens, gen. et sp. nov. 

 Fig. 15.— Right pharyngeal bone, x 15. 



Ophiocephalus harcourt-butleri, sp. nov. 

 ^jQ^ 16. — Head and forequarters from below, x |. 

 „ 17. — Jaws and teeth, X 2. 



