PLATE 4. 



Fig. 9. — Photo, head of Hydrosaurus pustulosus (Esch.). PhilUpine Islands. Page 88. 



Fig. 10. — Same of Hydrosaurus weberi Barbour. Weeda Halmahera. Type. Page 88. 



Fig. 11. — Same of Hydrosaurus amboinensis (Schlosser). Piru, Ceram. Page 87. 



(Fig. 9-11 slightly reduced). 



