640 



Records of the Indian Museum. 



[Vol. XXIT, 



the growth of the fish thej' are in the latter case covered by 

 secondary folds. These, the anterior and the posterior labial folds, 

 have hitherto been termed the upper and the lower lips. 



TE.<T-riG. I. — Development of menial disc in Garra. 



1 — 8 represent successive developmental stages of the disc in Garra. 



a := rostral barbel ; 6 = median portion of posterior lip ; c := posterior 

 labial fold ; d = connective ; e = callous portion of disc ,• _/"== papillate disc 

 rudiment : g:^ anterior labial fold ; li = anterior lip ; t =: mouth ; j = lateral 

 swollen portions of posterior lip ; k = maxillary barbels ; / = branchios- 

 tegal rays ; m := posterior free margin of disc. 



Although the development is gradual I have thought it con- 

 venient to select a nvimber oi representative stages and to describe 

 each in detail. 



In stage i the mouth is situated slightly behind the tip of 

 the snout and is bordered by the true lips. In front of the ante- 



