280 



CHAPTER III.— continued. 



ANALYTICAL INDEX. 



Variety of aspect great — size, form, &c., . . page 195 



Ova, ....... ib. 



Extremely languid — deep water its proper dwelling, . ib. 



Shell often totally invested by marine algae, . . 196 



Plates XLVII., XLVIII.. explained, . . . ib. 



D. — 3. Cancer (hyas) coarctatus, .... ib. 



Torpidity irresistible, . . . . . ib. 



Specimen described, . . . . . 197 



Small one washed on board a steam-vessel between Orkney and 



Shetland, ...... 198 



Plate XLIX. explained, . . . . . ib. 



§ (4.) Cancer phalangium, Macropodia phalangidm ; Leach, — The 



Spider Crab, ...... ib. 



Its form, organs, and colour, .... 199 



Weak and incapable of resistance, .... ib. 



Perpetuation, ...... ib. 



Senses alike obtuse as in other species, . . . ib. 



Food, &c., ...... 200 



Plate L. explained, . . . . . ib. 



§ (5.) Cancer horridus, Maia lithodes — The Prickly Crab, . 'JOl 



Dr Leach, . . . . . . . ib. 



Size, appearance, and organs, .... ib. 



Spawn cavity, .... . ib. 



Colour, ...... 202 



Plates LI., LII., explained, . . . . ib. 



PART II. A. — Decapodes, ten-limbed, long-tailed. Crustaceans, — Macrodri, ib. 



The Macrouri comprehend the Astacus, or Lobster, and its congenera, ib. 



Difference between the Cancer and Astacus great, . 203 



§ 1. Cancer Bernhardus, — The Hermit Crab or Soldier, . . ib. 



General remarks, ..... ib. 



Form, organs, size, and colour, . . . . ib. 



Food — lively and voracious, .... 204 



Its nature pacific, ...... ib. 



Process of exuviation different, and more obscure, . ib. 



Breeds at an early age, and somewhat differently from the Cancer, 205 



J The young bear no resemblance to the parent, . . 206 



