DR. T. CANTOR ON PELAGIC SERPENTS. 313 
Ff. Pterygoideus externus. 
g, g. Salivary glands. 
. The venomous gland detached. (Magnified.) 
. The same, longitudinally cut through. 
. Skull of Hydrophis schistosa (young). Magnified. 
. Lateral view of the same. 
. Lateral view of the skull of Hydrophis striata (adult). Magnified. 
OS OID cr 
(The straight lines denote the natural size of the skulls.) 
VOL. Il.—-PART IV. 27 
