266 THE ZOOLOGIST. 



cardiform teeth. The stomach held scales and vertebrae of some 

 fish that had been eaten. No teeth on the parasphenoid. A deep 

 cleft in mucous lining of palate. 



Notopterus kapirat, also an Indian river fish, has nine long 

 horny gill-rakers on the cerato-hypo portion of the first 

 branchial arch. The one at the angle is short, about one half 

 the length of the next one to it, which is one of the longest and is 

 one and a half times in length of the depth of the gill-lamina 

 below it. There are three gill-rakers on the first epibranchial. 

 The gill-rakers of the first arch are toothed. The other gill- 

 rakers are short, stout, blunt-ended on the outer sides of the 

 other arches, with smaller blunt-ended ones on the insides. 

 None of them bear any teeth. They fit into each other and 

 form a good filter. On the head of the fourth epibranchial some 

 minute teeth can be felt forming the upper pharyngeal teeth. 

 No lower pharyngeal teeth could be seen or felt. Forward from 

 the junction of the third hypobranchial with the basibranchial, 

 to the base of the tongue, there is a long plate which covers the 

 forward basibranchials bearing minute teeth ; these engage with 

 an elongated group of strong conical teeth on the parasphenoid 

 bone. Five strong curved teeth line each margin of the tongue, 

 with one at the tip. There are no teeth at the root of the tongue, 

 as in N. ehitala. The stomach of the specimen examined was 

 full of food. Amongst it was a fairly large piece of what looked 

 like the shell of a crustacean, and another piece looking like a 

 fragment of some insect. 



Chirocentridjs:. 

 Chirocentrus dorab has fifteen long, thin, horny gill-rakers on 

 the first cerato-hypobranchial arch, which are toothed. The 

 longest, the one at the angle and the one next to it, are about 

 equal to the depth of the gill-laminae below them ; these gill- 

 rakers decrease regularly in size as they get nearer the tongue. 

 There are four similar but smaller gill-rakers on the first 

 epibranchial arch. On the inner sides of the first and of the 

 other arches there are minute teeth. The outer side of the 

 second arch has shorter and flatter horny gill-rakers than those 

 on the first arch ; these are also denticulated. The third and 

 fourth arches are bare of gill-rakers. There are small cardiform 



