334 



SYSTEMATIC ZOOLOGY. 



body. The species, which are all small, are known, from 

 their fanciful shapes, as pipefishes and sea-horses (fig. 136). 



FIG. 135. Sunfish (Mola rotunda). After Putnam. 



Many have a remarkable peculiarity in breeding habits, in 

 that the young are carried for a time in a pouch beneath 

 the tail of the male. 



SUBCLASS IV. DIPNOI (Lung-fishes). 



Four species, one from Australia, one from Africa, and 

 two from South America, are the sole living representa- 



