280 ANALYTICAL INDEX. 



CHAPTER III. continued. 



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., XLVIIL, explained, . . ib. 



I 



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 PHALANOIUM, MACROPODIA PHALANGIUM ; 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, . 201 



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, MACRODKI, 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 



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



