GLOSSIPHONIA. 53 



Hirudo bioculata, MiilL Verm. i. ii. 41 ; Zool. Dan. Prod. 220. Stew. 



Elem. ii. 357. Ure^s Rutherglen, 234. 

 Hirudo crenata, Kirhy in Linn. Trans, ii. 318. 

 Glossiplionia perata, Johnson on Med. Leech, 26. 

 Glossopora punctata, Johnson, Furth. Obs. 50. pi. 1/. f. 11-13. 

 Erpobdella bioculata. Lam. An. s. Vert. v. 296 ; 2nd edit. v. 528. 

 Clepsine bioculata, Savig. Annel. 119. Muell. Hirud. Berol. 31. 



Dies. Syst. Helm. i. 448. 

 La Sangsue bioculee, Blainv. Diet, des Sc. nat. xlvii. 265. 

 La Sangsue pulligere, Blainv. lib. cit. 266. 

 Glossobdella bioculata, Blainv. lib. cit. Ivii. 565. 

 Glossopora bioculata, Flem. Phil. Zool. ii. 604. 

 Erpobdella stagnalis, Templeton in Loud. Mag. Nat. Hist. ix. 235. 

 Clepsina stagnalis, Brightwell in Ann. Sf Mag. Nat. Hist. ix. 14. 

 Glossiphonia bioculata, Moq.-Tandon, Monogr. 366. pi. 13. f. 16-26. 



Hab. Lakes, ponds, and ditches : common, 

 (a) Holy-Island Lough, Dr. Johnston. 



Of the following species I have seen no specimens : — 



7. G. flava, flattish, dilated backwards, yellow ; the head lanceolate 

 or "trout-shaped;" eyes 2, black. Length 14'". 



Hirudo flava — the Yellow Leech, Dalyell, Pow. Great, ii. 45. pi. 5. 

 f. 1-19. 



Hab. Ponds : rare. 



Obs. " This is one of the few Leeches which we are enabled to 

 distinguish by the form of the head." Margins slightly crenated. 

 The colour is either very vivid yellow or dusky, and there are some- 

 times four rows of yellow spots down the back. — Dalyell. 



8. G. circulans, oblong, narrowed forwards, the dorsal surface red- 

 dish, flat and pale underneath ; eyes 2. Length 1". 



Hirudo circulans, Johnson on the Med. Leech, 27. Turt. Brit. Faun. 



129. Penn. Brit. Zool. iv. 72 (1812). 

 Glossiphonia circulans, Moq.-Tandon, Monogr. 384. 

 Clepsine Sowerbyi, Dies. Syst. Helm. i. 451. 



Hab. Ponds. 



9. G. vitrina, nearly cylindrical, dark green, with two indistinct 

 whitish longitudmal series of spots on the dorsum ; eyes 8, in two 

 parallel series. Length 1". 



Nephelis tesselata?, Brightwell in Ann. ^- Mag. Nat. Hist. xiii. \A. 1. 



f. 15-17. 

 Hirudo vitrina, Dalyell, Pow. Creat. ii. 42. pi. 5. f. 20-23. 



Hab. Rare. Li rivers and pools. 



Obs. " Like the tessulata, the substance is tremulous, though to 

 a shghter degree than in that animal." — Dalyell. 



