BY E. P. RAMSAY, F.R.S.E., AND J. DOUGLAS-OGILBY. 17 



posterior portion of the Lead closely granulated ; median longitu- 

 dinal groove lanceolate, gradually broadening to behind the eyes, 

 whence after a slight convergence it suddenly opens out into a 

 large oval patch : occipital process narrow, its breadth at the base 

 not half its length. Opercle wider than high. All the barbels 

 short and hairlike, the maxillary just touching the opercle. A 

 few short sharp teeth irregularly scattered over the jaws ; none 

 on the vomer or palate. Dorsal fin higher than the body ; its spine 

 is weakly serrated in front and behind, and is £ of the length of the 

 head ; base of the adipose dorsal J of that of the rayed fin. 

 Pectoral spine much shorter than that of the dorsal, smooth 

 externally, but strongly denticulated on the inside, not reaching 

 to the ventrals, which themselves barely reach the anal. : caudal 

 deeply forked. Colors, steel blue above, silvery on the sides, 

 white below, the different tints blending imperceptibly together : 

 a small white spot on the top of the head in the groove ; fins 

 light-colored. 



The example described measures 9^ inches, and is entered in 

 the register as B. 9938 ; its mouth was completely filled with 

 young ones, having the yelk-bag still attached ; the total length of 

 the young fish is § of an inch, while the diameter of the yelk-bag, 

 round which it was partially curled, is more than J of an inch at 

 this stage of their existence ; the adipose fin extends from oppo- 

 site the anal fin to the caudal, with which it is confluent ; the 

 caudal also is but slightly forked. In a second example the 

 young are much more developed, the yelk-bag has been absorbed, 

 the caudal is more forked, and the adipose dorsal, though still 

 large, has severed connection with it. In our smallest example, 

 but 5 inches in length, the teeth are but little more numerous 

 than in the specimen described. We name this fine species after 

 Mr. Francis Day F.L.S., F.Z.S., &c, whose magnificent work on 

 the fishes of India is indispensable to every student of Indo-Pacific 

 ichthyology. 



Hab. Strickland River. 

 2 



