140 HIRUDO MEDICINALIS. 



inferior in delicacy and flavour. The mussel, and even the Oyster, 

 in some constitutions, has occasioned the same symptoms as those 

 arising from fish poison. In such cases, emetics, cathartics, par- 

 ticularly castor oil, the vegetable acids properly diluted, and cordials, 

 are the best remedies. 



Off. Prep. — Testae preparatae, L. 



Class VIL— ANNELIDES. 



Body soft, more or less elongated, naked or inclosed 

 in a tube, and divided into a number of segments ; blood 

 red. 



XXIII. 

 HIRUDO MEDICINALIS. 



Medicinal Leech. 



Order Cryptobranchia, Cuv. Apodes, Lam. 

 Gen. Char. Body oblong, slightly depressed, composed 

 of numerous contractile segments, and with the pos- 

 terior extremity terminated with a broad prehensile 

 disc ; mouth naked, dilatable, armed interiorly with 

 three teeth ; eyes none ; skin subcoriaccous. 



Spec. Char. Body elongated, blackish, with six longi- 

 tudinal yellow lines, two of which are lateral and inter- 

 rupted by a series of longish black spots ; abdomen 

 greenish olive, clouded with black. 



Tltriido major ctvaria; Gesner, Pise. t. 425. Hirndo medicinalis ; St/sl. Nat. Gme- 



lin, i. p. 3095; Faun. Suec. 2079; Muller, Hist. Verm. p. 19, t. 2, f . 5 ; 



Bergman, Act. Holm. an. 1757, p. 308, t. 6, f. 1, 2; Shaw, Nat. Miscell. vi.t. 



218; Johns. Treat, p. 30. 

 Sang Sue, Fr.; Sanguisuca; Magnalla,h.; Sanguijuela, Sp. ; Blutiul ; JEgle, 



Ger.; Kheruheen, Arab.; .Tone, Ind. 



