GLOSSOPORIDiE. 49 



Hirudo medicinalis, Linn. Si/st. x. 649, xii. 1079 ; Faun. Suec. 2nd edit. 



505. Weser in Amcen. Acad. vii. 45. Mull. Verm. i. ii. 37 > Zool. 



Dan. Prod. 219. Penn. Brit. Zool. iv. 36. Turt. Gmel. iv. 68. Turt. 



Brit. Faun. 129. Stew. Elem. ii. 356. Penn. Brit. Zool. iv. 69 



(1812). Watson, Disp. inaug. de Hirudine, 12. Blumenb. Man. 



244. Johnson on the Med. Leech, 29. Bojanus in Journ. de Phy- 

 sique, Ixxxviii. 468 (1819), pi. f. 1-5. Lam. An. s. Vert. v. 291 ; 



2de edit. v. 520. Stark, Elem. ii. 143. Leach in Supp. Encyclop. 



Brit. i. 451. pi. 26. Home, Comp. Anat. iv. pi. 39. f. 3 ; ibid. ii. 70. 



Ephem. Acad, Leop. cent. viii. 338. tab. 5. f. 1-3. D. Chiaje, An. 



s. Vert. Nap. i. 47. Moq.-Tandon, Monogr. 327. pi. 7-11. f. 1-18. 



Payraud. Annel. et Mollusq. de Corse, 17. Jones, An. Kingd. 191. 



Christison, Edin. Disp. 488. Dies. Syst. Helm. i. 465. Dalyell, 



Pow. Creaf. ii. 26. pi. 3. f. 11. 

 Sanguisuga medicinalis, Savig. Annel. 114. Encyclop. Brit. xi. 225. 



pi. 176. f. 14. Risso, I'Europ. Merid. iv. 428. Brightwell in Ann. 



8f Mag. Nat. Hist. ix. 13. 

 La Sangsue, Lesser, Insect. Theol. ii. 181. Milne-Edwards, Elem. 



Zool. ii. 226. 

 La Sangsue medicinale, Blainv. Diet, des Sc. nat. xlvii. 254. Cuv. 



Reg. Anim. illustr. Annel. 49. 

 latrobdella medicinalis, Blainville in Diet, des Sc. nat. Ivii. 561, Atlas 



Hirudin, f. 4, et tab. sec. f. 1. Egidy, Bluteg. 113. f. 62, 63. 

 Medicinal Leech, Kurzmann in Lond. Med. ^ Physic. Journ. xli. 312 



(1819). Fremond in Ann. Sf Mag. Nat. Hist. ser. 2. viii. 431. 



Hab. Lakes and ponds. 



Obs. There is a series of granules, on a raised line, across the 

 middle of every segment. Mr. Bowerbank has given an elaborate 

 description of the cocoon in Ann. & Mag. N. H. xv. 301. pi. 18, 

 fig. omn. The only British specimens I have seen are those in the 

 Museum Collection ; and they may be referred to the variety cMoro- 

 gastra of Moquin-Tandon, The specimen (b) from Weymouth is 

 manufactured I know not how. It has the shape of a Glossiphonia. 

 When let fall in a plate the sound made is like that which a stone of 

 the same size would produce, and suggests a passing suspicion that 

 the body may be fossil. Its real character is disclosed by an exami- 

 nation of the eyes more especially. 



(a) Christchurch, Hants, /. C. Dale. 



(b) Weymouth, JF. Thompson. 



Tribe II. CLEPSINEA, Grube. 

 Fam. V. GLOSSOPORIDiG. 



Obs. These are small and neat leeches, usually so transparent as 

 to permit the disposition of the viscera to be seen without any dis- 

 section. They are further distinguished, 1st, by having a cylindrical 

 proboscis capable of being extruded at will from the oral aperture ; 

 2nd, by being more strictly geometric in their mode of progression 

 than other leeches, and capable of contracting the body into a ball 



