284 



CHAPTER IV. continued. 



ANALYTICAL INDEX. 



Its slender form described, .... PAGE 234 



Languid, and of a tranquil disposition, . . . 235 



Prolific female, . . . . . ' ib. 



The young and their organs, . . . . ib. 



The animal dwells in the sea, . . . . 236 



Plate LXIV. explained, . . . . . ib. 



8. PYCNOGONUM LITTOKALE, The Whale Louse, . . ib. 



Unlike the preceding, this animal is coarse and strong, . ib. 



Its form, &c., described, .... ib. 



Most languid of all creatures, and without propensities, . ib. 



Great disparity of size, . . . . 237 



Plate LXIV. explained, . . . . . ib. 



Note, Pycnogonum, Mr Henry D. S. Goodsir, . ib. 



9. ASELLUS VOLGARIS, . . . . . ib. 



Doubtful if this animal has been assigned its proper position in 



the Systema Naturae, ..... 238 



Though rare, it abounds in a pond at Red Braes, near Edinburgh, ib. 



Coarse, repulsive animal, called the Slater in Scotland, . ib. 



Its form, ...... ib. 



Does not swim, but runs, . . . . . ib. 



Propagation, ...... ib. 



Exuviation less frequent than amongst other Crustaceans, . 240 



Extremely pacific and tranquil, ... ib. 



Plate LXV. explained, . . . . ib. 



10. LlMNORIA TEREBRANS, . . . . . ^ 241 



Attention directed to this insect in 1826 by its ravages on the 



Chain Pier, ..... ib. 



Dr Coldstream's observations, . . .' . 242 



Dr Leach instituted a new genus for its reception, . ib. 



Its form, organs, &c., described, . . . . ib. 



Much diversity of size prevails, . ' . ib. 



Ovarium, . . . ... . . ib. 



Food the wooden piles, .... ib. 



Various remedies found unavailing, . . . 243 



Plate LXV. explained, . ib. 



11. CYPRIS PILOBA, ...... ib. 



Usually associated with the species named Entomostraca, 244 



Genus Cypris includes several species, . . ib. 



