ORDER ABRANCHIA. 
35 
have been regarded as gills ; but I can discover no vessels 
there. Its epidermis is ample, and envelopes it like a very 
loose sack. It is the Branchelliom torpedinis of Sav. ; but 
the species observed on the tortoise should not be associated 
with it. Hir. branchiata , Menzies, Linn. Trans. I. xviii. 3., 
which truly appears to have plumose gills, and which it 
would be necessary to examine again. 
We also commonly range among the leeches, 
Clepsina, Sav., Glossopera, Johns which have a 
widened body, a posterior cup only, and the mouth in the 
form of a proboscis, and without sucker ; but it may not be 
impossible that some of them rather belong to the family of the 
planaria. 
M. de Blamville names them Glossobdella ; Hir . com- 
planata , or sexoculata , Berg. Mem. de Stockh. 1757, pi. vi. 
f. 12 — 14; H. trioculata , ib. f. 9 — ll ; Hir . liyalina , L., Gm., 
Trembley, Polyp, pi. vii. f. 7 ; Clepsina paludosa , Moq. Tand. 
pi. iv. f. 3, &c. 
I believe them still more allied to the Phylline, Oken ., 
and to the MALACOBDELLA3, Blainv ., which have also broad 
bodies, and are destitute of proboscis and anterior sucker. 
They are parasite animals : the first are named Epibdella 
by de Blainv. ; Hir. hippoglossi , Mull. Zool. Dan. liv. 1 — 4. 
To the second belongs Hir . grossa , Mull. Zool. Dan. xxi. 
Gordius, £., 
Have the body resembling a thread, slight transverse folds 
only marking its articulations, and neither feet, gills, nor ten- 
tacula are visible. Nevertheless, in the interior, a nervous 
system is still distinguishable in a knotted cord. Perhaps, 
however, it may be necessary to place them definitively 
with the cavitary intestinal worms, like the nemertes. 
