6io 



DEPTHS OF THE OCEAN 



(see Figs. 466-469). They are small, generally black, forms, with a mouth 

 of gigantic size provided with powerful teeth. They have attracted 

 special attention from the nasal tentacle carrying at its end a peculiar 



Antennariiis 



Fig. 471. 

 irmoraius, Giinth. Nat. size, 3.3 cm. 



lantern-like light-organ. Of the eight species of Ceratiidae taken during 

 our crui.se, no less than five are supposed to be new to science ; one 

 species {UTelanocettis krecJii) is represented by a single specimen 



Fig. 472 

 Moitacanthtis. Nat. .siz 



from the Indian Ocean. Such facts show that our knowledge of the 

 fauna of the ocean still leaves much to be desired. Remarkable small 

 forms of the genus Aceratias (see Fig. 470) al.so belong to this sub-order. 

 One of these was previously known from the Indian Ocean only ; the 



