332 ANALYTICAL INDEX. 



CHAPTER I. continued. 



Figure and organs of the Chequered Leech described, PAGE 40 



Finest and most beautiful of the Scotish leeches, . . ib. 



Colour, &c., ...... ib. 



Viscera not so numerous, . . . . . ib. 



Food not precisely ascertained, .... ib. 



Propagation, . . . . . . .41 



Specimens from Coldingham Loch and the Island of Bute, . 42 



Sir Walter Trevelyan, Baronet, . . . ib. 



Plate IV. explained, . . . . . ib. 



10. HIKUDO VITEINA, The Glassy Leech, . . ib. 



Size, form, and organs described, .... 43 



Number of young produced, . . . . .44 



Animal rare found near Craigcrook Castle, . . 45 



Mr Brightwell found one in Norfolk, . . . . ib. 



Plate V. explained, .... ib. 



11. HIRUDO FLAVA, The Yellow Leech, . . . . ib. 



Distinguished by the form of the head, ... ib. 



Incessantly variable in shape, . . . . ib. 



Organs, &c., described, ..... ib. 



Food not positively ascertained, . . . .46 



Breed from May to August, .... ib. 



Separation of the ova, . . . . . ib. 



The animal is rare, ..... 48 



Plate V. explained, ...... 49 



General remarks on the Leech, .... ib. 



CHAPTER II. VERMES, 51 



Remarks on the class denominated Worms, . . ib. 



Unfortunate that Linnaeus should have so generalised the order, ib. 



Not clear where one genus terminates and the other begins, 54 



I. GORDIUS, 55 



The genus described, ..... ib. 



Lamarck, ....... ib. 



1. GORDIUS JPEAGILIS 



One of the rarest and most remarkable animals of Scotland, and the 



largest of the vermicular tribes, . . . . ib. 



Length and other characteristics, .... 56 



