134 PLANARIA EDINENSIS. 



the belly, and by general correspondence 

 in figure and motion : the species are dis- 

 tinguished by the variety, number, and po- 

 sition of eyes, the presence of tentacula, 

 and mode of propagation. A second divi- 

 sion arises from the appearance of the ani- 

 mals, conjoined with the site of the eyes 

 and mouth, in which a prominent charac- 

 teristic is the want of a proboscis, so far as 

 can be ascertained. Though nearly the 

 same leading features belong to the subject 

 of this section, perhaps it might more cor- 

 rectly have preceded the two already de- 

 scribed, or stood as an intermediate race. 



The planaria Edinensis, so called from 

 inhabiting the discharge from the Well- 

 house Tower, near the castle of Edinburgh, 

 is about a quarter of an inch in length, and 

 slightly tapers upwards from the lower ex- 

 tremity, which terminates abruptly in a 

 point ; while the head is obtuse, and void 

 of tentacula. In an ordinary state, the 

 body is flat below, convex above, and with 

 a longitudinal ridge, apparently elevate dj 



