190 Records of the Indian Museum. fVoL. XVIII, 
‘“ Perhaps allied to N. sargadensis, Nikolski, 1899, the descrip- 
tion of which is somewhat deficient in structural details, but the 
colouration appears to be too different to justify identification.” 
The largest specimen referred to by Mr. Regan is now in the 
collection of the Zoological Survey of India and is labelled as 
the type. Our measurements 
do not altogether agree with 
his, for we estimate the length 
at a little over 268 mm. We 
find that the head is contained 
in the total length without 
the caudal fin 51 times and the 
greatest depth of the body 
nearly 11 times. ‘The differ- 
ws ence is evidently due to the fact 
TEXxT-riG. 15.—Air-bladder of Adiposia that the specimen is some- 
AUERIMETS SE what curved. We have taken 
_ The bladder has been dissected out of the mean length of the mea- 
its bony capsule but remains 77 sitz un at 
pressed against the lower surface of the surement obtained along the 
vertebral column. outer and that along the inner 
side. 
We have failed to find any trace of scales. ‘The air-bladder 
differs from that of A. macmahoni in that the posterior diverticulum 
is extremely short and its vesicle minute. 
The fish is readily distinguished from its ally by its more 
elongate body, smaller, narrower and less flattened head and by 
marked differences in outline. These differences are shown in 
our figures of the types of the two species. 
All the specimens known were obtained by the Seistan Arbit- 
ration Commission in the delta of the Helmand. 
