40 STAR-FISHES, SEA-URCHINS, ETC. 



bra of Zamboanga lives an entirely different fish (Enchely* 

 ophis vermicular is]. 



FIG. 38. Sea-cucumber {Holothuria luted), showing tentacle-like gills. 



NOTE. The common Pentactes of the North lies buried in the sand, 

 the tentacle-like gills resembling mosses of various kinds. In some 

 species they look like toadstools ; others resemble broad leaves or short, 

 delicate shrubs, and, when concealed in the sand, these mimicking 

 mouth-parts are thrust up, and wave to and fro in the current, deceiv. 

 ing the shrewdest of their enemies. 



Development. The young are devel- 

 oped much as in the star-fishes ; some 

 are at first free swimmers by means of 

 cilia, and pass through change of forms 

 as curious and distinct as in many in- 

 sects (Fig. 40), while others appear at 

 first in the adult form, and are protect- 

 ed in nurseries called marsupiums. 



FIG. 39. Anchor- 

 plate in Synap- 

 ta, magnified. 



VALUE. Over 1,000 vessels are engaged in the trepang-fisheries 

 of the East. The yearly shipment of them from Macassar alone amounts 



