460 



ZOOLOGY 



SECT. 



The Earthworm is devoid of organs of sight or hearing. It 

 exhibits sensitiveness to bright light, the sensitive elements being 

 large cells of the epidermis devoid of pigment. The sense of 



coe 



ext 



JL 



Fi<;. 362. Nephridium of Lumbricus (diagrammatic). a. ampulla between ciliated and non- 

 ciliated parts of the intracellular canal ; cil. ciliated part of the iutracellular canal ; <<><. 

 investment derived from the crelomic epithelium ; eft. nephridiopore ; (.<: non-ciliated part 

 of the intracellular canal ; //^'.s\ .septum ; ;.s<. nephrostome ; t.v. intercellular canal of the 

 terminal vesicle. I. III. the three principal loops. (From Meisenheimer, after Ma/Jarski. ) 



hearing appears to be absent ; but a faculty analogous to taste 

 or smell, enabling the animal to distinguish between different 

 kinds of food, is well developed. The goblet-shaped bodies, groups of 



