99 9 
QOL ANALYTICAL INDEX. 
CHAPTER I.—continued. 
Figure and organs of the Chequered Leech described, PAGE 40 
Finest and most beautiful of the Scotish leeches, : 6 ib. 
Colour, &e., ; ; : : : - _ ilo: 
Viscera not so numerous, : : ‘ : 3 ib. 
Food not precisely ascertained, 0 f : . ib. 
Propagation, . : 41 
Specimens from Goldin sham Teen and the Talend of Bate, c 42 
Sir Walter Trevelyan, Baronet, : : : a File 
Plate IV. explained, 0 : é : . ib. 
§ 10. Hrrupo virrina,—The Glassy Leech, : : : ib, 
Size, form, and organs described, . : : 5 43 
Number of young produced, . c : : ; 44 
Animal rare—found near Craigcrook Castle, : c 45 
Mr Brightwell found one in Norfolk, . : : é ib. 
Plate V. explained, : . : ; : ib. 
§ 11. Hirupo riava,—The Yellow Leech, . : : : ib. 
Distinguished by the form of the head, c : : ib. 
Incessantly variable in shape, : ; . 2 ib. 
Organs, &e., described, & 6 ° . : ib. 
Food not positively ascertained, 0 : . - 46 
Breed from May to August, : c : c ib. 
Separation of the ova, : ; . : : ib. 
The animal is rare, “ ; . : : 48 
Plate V. explained, 3 : ¢ ‘ : : 49 
General remarks on the Leech, 5 : : : ib. 
CHAPTER IL—VERMES, . : : < : : : 51 
Remarks on the class denominated Worms, ib. 
Unfortunate that Linneeus should have so peneralicel the ealen ib. 
Not clear where one genus terminates and the other begins, 54 
I. GORDIUS, c : : ; : : : 55 
The genus described, ‘ c : ; c ib. 
Lamarck, 3 : : : ; : ib. 
1.—GorbIUs FRAGILIS— 
One of the rarest and most remarkable animals of Scotland, and the 
largest of the vermicular tribes, . . . : ib. 
Length and other characteristics, . : : 5 56 
