732 JOURNAL, BOMBAY NATURAL HISTORY SOCIETY, Vol. XVI. 



Anterior margin of dorsal ... 



Tail-flukes along the curve 



Expanse of tail 



Beak from groove which separates the forehead. 



Genital groove 



Anal opening 



Gape of mouth 



Greatest breadth 

 ,, height 

 „ circumference 



Smallest circumference 



Height of dorsal fin ... 



Length of dorsal fin at base ... 



Greatest circumference ... 



Smallest circumference 



Lower jaw about half an inch longer than upper. Colour blue-black, paler at 

 the sides ; beneath fleshy grey. Lower jaw dull grey ; a dark blue band, same 

 as the smaller specimen, but less clear. Genital and anal regions fleshy 

 pink. 



Teeth || and |f=55 and 53. 



Vertebrae: C. 7, D. 12, L. 16, Ca. 23=58. 



Ribs 12, of which five are two-headed. 



Pterygoids not in contact. 

 The following are the particulars of the 1904 specimen supplied to me from 

 the Trevandrum Museum : — 



Extreme length 



From tip of beak to origin of dorsal fin 



„ flipper .. 



„ „ anal opening 



Length of flipper round the outer curve 



„ dorsal fin 



Expanse of tail-flukes 



Greatest height including dorsal fin 



Height of body 



Greatest girth 



Smallest girth 

 Lower jaw somewhat protruding. 



Colour. — Upper surface, flippers, and sides of tail glistening dark brown 

 abruptly passing into dull silvery grey (paling into light sea-green after skin- 

 ning) on the sides ; facial region paler; underside dull pearly white, extending 

 to a little behind the anal opening ; orbits in a dark brown oval blotch, which 

 gradually fuses into a tapering band running above and parallel to the basi- 

 rostral groove and uniting at the angle of the (V-shaped) prenarial adipose 



