44« PLANARIA FELINA. 



be extended to a point. When fully dis- 

 played, the tentacula bear no imperfect re- 

 semblance to the ears of a cat. The neck, 

 which is narrower than the head, gradually 

 enlarges downwards, until the extreme 

 breadth of the animal is attained, and then 

 a regular diminution ensues, terminating in 

 a pointed tail. In the under surface, which 

 is paler than the upper, one ventral pore 

 can with difficulty be recognised ; but the 

 vicinity of an important organ, the probos- 

 cis, is usually indicated by an elliptical spot, 

 clearer than the general hue. 



By microscopical observation, or even 

 with acute vision, here also a numerous row 

 of jet black specks may be discovered, en- 

 vironing the anterior margin, and proceed- 

 ing about half down the body on either 

 side. Their number varies in different in- 

 dividuals ; sometimes they are nearly equi- 

 distant, sometimes irregularly arranged, or 

 two appear quite close, and almost con- 

 founded toirether. I have counted between 

 thirty and forty in several ; and the margin 



