1867.] MR. F. DAY ON INDIAN FISHES. 287 



spine exists opposite the anterior inferior extremity of the orbit ; it 

 is present in both males and females. 



Fins. Not scaled at their bases. The dorsal arises slightly anterior 

 to the origin of the ventral, the anterior extremity of its base being 

 nearly the same distance from the snout as its posterior extremity is 

 from the posterior extremity of the caudal fin. Pectoral rather large 

 and pointed. Ventrals subhorizontal, reaching as far as the anus, 

 which is a short distance anterior to the origin of the anal fin ; this 

 last is short. Caudal lobed in its last half. 



Scales apparent over the whole of the body, but not very distinct ; 

 none on the head. 



Lateral line passes direct from opposite the eye to the centre of 

 the caudal fin. 



Colours. Light brown, with numerous irregular-shaped spots and 

 bars proceeding from the back towards the latei'al line; head brownish, 

 with a dark line from the snout through the orbit ; dorsal fin with 

 about three rows of dark spots ; caudal irregularly barred ; a dark 

 line runs down the centre of the back. 



Hab. Bowany and Seegoor Rivers, as well as the Billicul Lake. 

 A few were placed in the ponds in the Government Gardens at 

 Ootacamund. 



Nemacheilus denisoni, nov. sp. 



B. iii. D. 2/7. P. 11. V. 8. A. 2/4. C. 19. 



Length of head ^, of pectoral f, of caudal ^ of the total length. 

 Height of head ^V, of body yV of the total length. 



Back broader and more flattened than in the last two species. 

 The two pairs of ci)ri on the snout, as well as the maxillary pair, are 

 all short. 



Dorsal fin commences slightly in advance of the ventral, and is 

 situated in the centre of the total length. 



Colours. Of a rich light reddish-brown colour, having twelve 

 yellowish-olive bars passing across the back, and continued verti- 

 cally down either side of the body to the abdomen ; before the dorsal 

 fin they irregularly coalesce across the back ; summit of head dotted 

 and marbled with bl.ack points ; dorsal fin with three rows of fine 

 black dots ; caudal irregularly dotted in bands ; some dull spots on 

 anal and ventral fins ; pectoral with a darkish external edge. 



Hab. Bowany River. 



I have named this species after Sir William Denison, K.C.B., 

 under whose auspices the Indian fish-experiment was commenced ; 

 and during whose governorship, had he continued in Madras, it 

 would most assuredly have been successfully completed. 



Whilst engaged upon this experiment I communicated with Mr. 

 Assistant Apothecary Everard, stationed at Trichoor, my wish to 

 obtain some more specimens of my Platacanthus agrensis (P. Z. S. 

 1865, p. 296), and he was good enough to forward me twelve. Being 

 taken during the breeding-season, their colours were much more vivid 

 than in the specimen which I described. I found two distinct sorts, 

 the markings of both being identical ; but in the one the ])ectoral 



