312 APPENDIX. 



give us many directions in what manner to prevent the consequences. 

 One is very ingenious : — the j)atient is orderetl to get into a hot bath 

 and hold cold water in his mouth, which will have the effect of 

 attracting the leech towards it!— See Adam's Paul. jEginet. ii. 208. 

 They were prescribed by Q. Seremis Samonicus internally to prevent 

 the growth of hairs ; and here is the receipt : — 



C. XXXV. To prevent the growth of hairs : — 



. . . . E stagnis cessantibus exos hirudo 

 Sumitur, et vivens Samia torretur in olla : 

 Haec acidis jungit permixta liquoribus artus 

 Avulsamque vetat rursus percrescere silvara. 



In the poetry of the Servians the leech is the favourite object of 

 comparison with the eyebrows of beauty : — " Like it are the maiden's 

 eyebrows :" — 



" For eyebrows, from tbe ocean's wave 

 They took two leeches." — Hones Every Day Book, iii. 535. 



Diesing states, on the authority of Dr. J. R. Johnson, that Hirudo 

 troctina is a native of England {Syst. Helm. \. 468). 



GLOSSIPHONIA (page 50). 



These leeches are usually so transparent when alive as to permit 

 the disposition of the viscera to be seen without any dissection. 

 They are further distinguished, — 1st, by having a cylindrical probos- 

 cis which they extrude from the mouth when they are about to suck 

 their prey ; 2ndly, by being more strictly geometrical in their mode 

 of progression than other leeches, and capable of contracting the 

 body into a ball when alarmed almost as completely as the wood- 

 louse ; Srdly, by carrying the young for a considerable time after 

 birth attached beneath the belly. The ova are not enclosed in a 

 capsvde. Their development has been carefully described by Grube. 



Midler has made some interesting observations on the habits of 

 the species. — Hirud. Berol. 33 et seq. 



Glossiphonia tessellata ^page 50). 



Leech soft and gelatinous, semitransj)arent, of a light brown, olive 

 or grey colour, blotched with green and yellow, speckled with black 

 dots, and rough with minute sharp granules, somewhat convex on 

 the dorsal, and flat on the ventral surface, oblong or pear-shaped 

 when at rest, linear-oblong and clavate when extended, and then 

 about 2 inches in length. From the transparency of the body the 

 interranea are visible, and they form a series of curved, short, dark 

 fascife on each side of the mesial line by which they are connected. 

 There are more than ten of these crucial markings, which begin, 

 with a few faintly marked ones, a short distance behind the neck, 

 and are continued to the sucker. The hinder i)airs are connected 



