PLANARIA EDINENSIS. 135 



down part of the back ; but after feeding 

 copiously, the whole, from distension, as- 

 sumes a conical form, and the pointed tail 

 is obliterated. The body is smooth and 

 shining ; its general hue is the palest car- 

 nation, the anterior is rose colour, and the 

 ridge in some tends to cream colour or dull 

 white. Two black eyes are seated near 

 the front, in the rose-coloured part, which 

 in young planarise are ovoids, but in grown 

 animals considerably magnified, appear ir- 

 regularly globular. In the under surface, 

 a little behind the corresponding position 

 of the eyes, there is a long slit situated in 

 the centre of an indistinct ellipse clearer 

 than the rest of the body, which seems to 

 contain the mouth, and perhaps also the 

 termination of an oviduct or excretory ca- 

 nal. 



This planaria, like the others, is carnivo- 

 rous : it feeds voraciously on flesh, after 

 which it is so greedy as to leave the water 

 when in the immediate vicinity. On such 

 occasions, it has received no injury ; and 



