Phthinobranchii 455 
The species, few in number, known as sea-moths and sea- 
dragons, rarely exceed four inches in length. They are found 
Fic. 359 —Sea-moth, Zahses umitengu Jordan & Snyder. Misaki, Japan. 
(View from below.) 
in the East Indies and drift with the currents northward to 
Japan. The genera are Pegasus, Parapegasus, and Zalises. 
The best-known species are Zalises draconis and Pegasus voli- 
tans. 
No fossil species of Pegastd@ are known. 
