ABRANCHIATE. 469 



Albiona, Sav.(l) 



Differs from the preceding subgenera in the body, which is stud- 

 ded with tubercles, and in having six eyes. The Albionae inhabit 

 the Ocean. 



Alb. muricata; Hirudo muricata, L. A very abundant species 

 in the seas of Europe; it is covered with small tubercles(2). 



There is a parasitic animal that lives on the Torpedo called Bran- 

 chellion(3) which closely resembles a Leech in its two cups, de- 

 pressed body and transverse plicae. Its anterior cup, which appears 

 to have a very small mouth in the posterior margin, is placed on a 

 narrowed portion resembling a neck, at the root of which is a small 

 hole for the organs of generation; there appears to be another behind. 

 The lateral edges of its plicae, which are compressed and salient, 

 have been considered as branchiae, but I can find no vessels there; 

 its epidermis is ample, and the envelope like a very loose sac(4). 

 We also commonly place among the Leeches the 



Clespine, Sav. Glossopora, Johns.(5) 



The Clespines have a widened body, a posterior cup only, and a 

 probosciform mouth without a sucker; some of them, however, may 

 be found to belong to the family of the Planari2e(6). I consider 

 them more closely allied to the Piiylline, Oken(7), and to the Mala- 

 coBDELL^, Blainv.(8), which also have broad bodies, and are de- 

 prived of a proboscis and anterior sucker. They are parasitic ani- 

 mals. 



(1) The PoNTOBnELL^, Leach and Blainv. 



(2) Add, Pontobdella areolata; Pmit. verrucata; Pont, spinulosa, Leach, Zool. 

 Miscel., Ixiii, Ixiv, \xv;:Hirudo vittata, Chamiss., and Eisenhardt, Nov. Act. Nat. 

 Cur., t. X, pi- xxiv, f. 4. 



(3) The PoLTDOKA, Oken; Branchiobdei.lion, Rudolphi; and the Branchiob- 

 BELLA, Blahiv. 



(4) It is the BranchelUon torpedinis, Sav-, but it must not be associated with the 

 species found on the Tortoise {Hir. branchiata, Menzies, Lin. Trans., I, xviii, 3), 

 which really appears to have branchiae that resemble a branch of feathers, and 

 which it is requisite again to examine. 



(5) The Glossobdells, Blainv. 



(6) Hirudo complanata, L,., or sexoculata, Bcrgm., Stock. Mem., 1757, pi. vi, f. 

 12 14; Hir. trioculata, lb., f. 9 11; Hir. hyalina, L., Gm., Trembley, Polyp., 

 pi. vii, f. 7; Clespine paludosa, Moq. Tand., pi. iv, f. 3, &c. 



(7) EpiBUELLiE, Blainv.; Hir. hippoglossi, Mull., Zool. Dan., liv. 1 4. 



(8) Hir. grossa. Mull., Zool. Dan.,xxi. 



