VENOMS IN THE ANIMAL SEBIE8 



307 



of their spines, which are sometimes scattered all over the body, are 

 the species of the genus Chilomycterus, the most important of which 

 are C. orbicularis (fig. 117), and C. tigrinus (fig. 118), both of 

 which are found in the Indian Ocean. 



Fig. 117. — Chiloinyctems orbicularis (Indian Ocean). (After Savtschenko.) 



y 



Fig. 118. — Chiloviycterus tigrinus (Indian Ocean). (After Savtschenko.) 



C. — Teleostei. — Physostomi. 



This Order is characterised by the presence of a pneumatic duct to 

 the air-bladder. It consists of a large number of families, only two 

 of which, the SiluridcB and MurcenidcB, include venomous species. 



