44 
chiefly in its toothless maxillaries, though its dentition unusually feeble, 
». * * 
It appears unique -in its pointed snout, so that its physiognomy recalls 
superficially certain Halosauridae.l 
. 5 ■ f !. • * 
■ m i—i mi — »i r i i - — —- -*• —■ »■ —1> m tm m m n- - m m -tm -mmnm m m* mi mt tin—fn> fci »»* 
^ Iialisaurus; ceps, head* 
Halisauriceps longiceps (Lloyd) 
Alepooephalus longiceps LLOYD, Mem. Indian Mus . , vol.2, 1903, p.147, pi.44, 
fig.2. Bay of Bengal, 693 fathoms. 
9 
Depth 5 3/4 to 6; head 3 to 3 l/5, width 3. Snout 2 2/3 to 2 4/5 in 
from snout tip to eye, . 
head^ y\orbit 4 to 4 1/8; eye 5 1/5 to 7, 2 l/4 in snout, 1 to 1 2/5 in 
interorbital; maxillary reaches eye to 1 l/8 in eye, expansion 2 3/4 to 3 
in eye, length 2 2/5 to 2 3/4 in head from snout tip; interorbital 4 7/8 to 
5, low, level. Gill rakers 64^10, lanceolate, -about twice gill filaments or 
2 in eye. 
t 
Scales 52 in lateral line to caudal base; 6 above, 35 predorsal. 
Apparently bases of vertical fins scaly. Scales most all fallen, very 
caducous. Tubes in lateral line long, slender, well expbsed en few remaining 
scales. 
D. VI , 12, _I or VI, 13, I, rays all broken, fin bases subequal with 
those of anal or 3 3/4 to 5 in total body length without caudal; A. VI , 16, 
_I or ^* Z» ra Y s broken; caudal damaged, rudimentary rays well 
developed though little conspicuous; least depth of caudal peduncle 4 3/5 
to 5 l/4 in head; pectoral damaged, evidently would seem not to reach over 
