192 1.] vS. L. HORA : Fishes of the genus Garra. 663 



the figures of McClelland and the description of Giinthet I find 

 no difference between the various forms. I have also examined 

 the type of Day's D. modestus from Northern India, and cannot 

 separate it from other specimens from the Khasi Hills. 



The head and body are greatly depressed in this species and 

 the form resembles that of the species of the Homalopterid genus 

 Balitora ; it was probably the shape which led McClelland to 

 regard it as a species of his genus Platycara. The species is also 

 distinguished from other species of Garra by the fact that the chest 

 and the middle of the abdomen are naked while big scales are 

 present on the post-pelvic region, The pectoral fin is greatly 

 expanded and is considerably longer than the head. 



There is a marked difference in the colour of male and female 

 specimens. In a female example the colour in spirit of the dorsal 

 and lateral surfaces is dark livid grey, obscurely marbled with 

 yellowish brown ; the ventral surface is dull-yellowish. There is a 

 dark streak near the free margin of the dorsal and a broad, black, 

 W-.shaped band on the anterior half of the caudal fin ; an indis- 

 tinct black blotch is present near the base of the caudal and a 

 small black spot just behind the angle of the operculum. In the 

 male the colour of the body is much lighter and the characteristic 

 markings on the dorsal and the caudal fins are absent. The speci- 

 mens from which the early descriptions were taken were in all 

 probability males as no reference to the characteristic colouration 

 of the female is made therein. 



The air-bladder in this species has deviated considerably from 

 the normal form. Not only is it much reduced but the posterior 

 chamber has become thread-like and its walls are greatly thicken- 

 ed ; the lumen of the chamber is almost obliterated. The anterior 

 chamber is firmly fixed to the body- wall by a fibrous coat which 

 covers it. In a mature female 56 mm. in length, the following are 

 the measurements of the bladder : — 



Length of anterior chamber ... . . ... ^'2 mm. 



., posterior ,, .. . ... 3-0 inm. 



Greatest diameter of anterior chamber . . ... 2'7 mm. 



,, posterior ., ... ... I'omm. 



In Day's type of modestus, however, the bladder is better 

 developed and corresponds more closely to the normal form. The 

 following are its measurements : — 



Length of specimen e.\cluding caudal ... .. 70 mm. 



,, ,, anterior chamber ... ... ... 3"7 mm. 



,, ,, posterior ,, ... ... ... 5'0 mm. 



Greatest diameter of anterior chamber ... ... 3'o mm. 



,, „ ,, posterior ,, ... ... 2-0 mm. 



I have examined specimens of this species from the following 

 localities : — 



Nong-priang Stream, Cherrapimji . B.Warren ,. ... S. 



Northern India (■?) ... . Purchased from Dav ... i. 



Assam ,, ... ... M us. Coll. ... ... i. 



Jaintia HiUs, Assam ... .. CoL Godwin .\usten ... 3. 



