47 8 



ZOOLOGY 



been able to glean only about as much as we might of 

 the land if a few balloons dragged nets over the sur- 



ncf 



From Perrier's " Traite de Zoologie " 



FIG. 206. Two deep-sea fishes, Thaumatostomias atrox (lower) and Stomias boa 

 (upper): o, eye; k, luminous placques; /, luminous spots; c, canine teeth; b, 

 barbels ; lg, tongue ; np, pectoral fins ; nd, dorsal fin ; na, anal fin ; nv, ventral fin. 



face of the country on dark nights. How poorly the 

 small collections of miscellaneous fragments thus ob- 

 tained would represent the life of the earth ! In the 

 case of the sea bottom, especially of the greater depths, 

 dredging is so expensive and laborious that it can hardly 

 be undertaken except by governments. Even with 

 public funds, it is possible to explore only an infini- 

 tesimal part of the ocean bed within a lifetime. 

 There is thus an endless fascination and mystery about 

 the sea, and the wonders of the deep will probably 

 continue to furnish materials for investigation as long 



as mankind exists. 



References 



MURRAY and HIORT. The Depths of the Ocean. Macmillan, 1912. 

 JOHNSTONE, JAMES. "Life in the Sea." Cambridge Manuals of Science and 

 Literature, 1911. 



