330 ANALYTICAL INDEX. 
CHAPTER I.—continued. 
Faculties very obtuse, . : ¢ : PAGE 10 
Chamisso and Eysenhardt, . 9 : ° ib. 
Plate I. explained, 5 g : . : 0 ib. 
§ 3. Hrrupo anceps, . é é . 11 
Its place in the Systema Waturie dgabicel : : c ib. 
Excluded from the genus Hirudo grossa by Tandon, : ib. 
Miiller’s account, F 4 : : : : ib. 
Length, organs, &e., 5 5 : é ib. 
Spawn, 7 ° 4 : : ¢ 12 
Plate I. described. : F : : : ib. 
§ 4. Hirupo campanutata,—The Bell Leech, 5 : ; ib. 
Description, : : ° : ib. 
Specimens perished i ina fortnight s : é : ib. 
Plate I. explained, : ° : 3 é ib. 
§ 5. UpoNELLA CALIGORUM, : 13 
One-half of the anicnced world will re dered: the filer ib. 
The present genus fall within the class of destroyers, . d ib. 
A parasite which infests the Caligus, : : : ib. 
Dr George Johnston, . é : 3 : 14 
Animal described, . é . a : ; ib. 
§ 6. Hirupo ocro-octLata, sruU VULGARIS,—The Eight-eyed Leech, ib. 
Not more than six marine leeches belong to Scotland, : ib. 
Principal distinction in specimens, : : - : 15 
General size, : c 7 ib. 
M. M. Tandon—description of the Hands octo- Uoeleee c ib. 
Fierce, active, and voracious, : é © : ib. 
Food, : < : : 16 
This species oe diffused 3 in Scotland! 3 0 ib. 
Embryo, : : 2 5 ; ib. 
Maturity of the eight- ral ieech 5 3 é 5 18 
Formation of capsules, 0 é 0 : 20 
Variety from a marsh in Abercorn panels : : : 21 
Specimen fed on white-fish, . : 2 : ; 22 
This species found also in Edinburgh, 5 . : ib. 
Plate II. explained, . : + 4 c ¢ ib. 
§ Hirupo sancuisuea,—The Horse Leech, . : 0 ib. 
This species universally dispersed throughout Europe, . 23 
