PIPE-FISHES. 



219 



some the latter has no caudal fin, and the tail is then 

 prehensile, like that of the Hippocampi, or " sea-horses." 

 In others it expands into a beautiful fan-like object. 



As these fishes move about solely by means of the 

 dorsal fin, and not by inflections of the body, the 



Fig. 147, 



Head and Tail of Broad-nosed Pipe-fish (Syngnathus typhle). 



Fig. 148. 



Head and Tail of Great Pipe-fish (Syngnafhns acies), 



reader may form some idea of their graceful and 

 gliding movements in the water. One of them 

 (Syngnathus cequoreus) has been seen swimming far 

 out at sea, whence its name of the " Oceanic Pipe- 



