C 339 3 
XXVI. Observations on the Hirudo complanata, and Hirudo 
stagnalis , wow formed into a distinct genus under the name , 
Glossopora. .By Dr. Johnson, of Bristol. Communicated 
by Sir Everard Home, Bart. V. P. R. S. 
Read June 26, 1817. 
I beg leave to lay before the Society, a few remarks on 
the Hirudo complanata and Hirudo stagnalis; animals that 
have been hitherto, but injudiciously, retained in the genus 
Hirudo. 
From the circumstance, in which they differ more parti- 
cularly from the leech, they are now formed into a distinct 
genus, under the term of Glossopora. 
These animals resemble the leech , 
a. In the body being furnished with a series of rings. 
b. In locomotion being effected by the alternate attach- 
ment of the head and tail. 
c. In the division of one general stomach into several late- 
ral cells or partitions. 
These animals differ from the leech , 
a. In the mouth being furnished with a projectile tubular 
tongue. 
b. In the body being nearly flattened, and pyriform. 
c. In having an abdominal pouch, or cavity, for the recep- 
tion of their young. 
The genus which they now form, takes the name (from 
yXurtrot, a tongue, and vropog, an aperture) of Glossopora. 
