148 APTEKA. 



may be heard at a great distance. Nothing 

 stops their progress, no obstruction makes them 

 turn aside, they never deviate either to the right 

 or left, but pass over every obstacle that it is 

 possible for them to surmount without break- 

 ing their line. When arrived at the shore, it 

 seems necessary that the sea-water should pass 

 two or three times over their bodies ; after this 

 ablution they retire to land till the spawn has 

 increased to a sufficient size, when they return 

 again, and having cast it into the sea, retire di- 

 rectly to the mountains. The little crabs, the 

 produce of the spawn, soon leave the shore, and 

 repair by slow degrees to the habitations of their 

 parents. 



SPECIFICATION. 



Cakcer hirtellus. C. Brachyurus, thorace hirto, 

 utrinque quinquedentato, manibus extus muri- 

 catis. Linn. Syst. Nat. 1. p. 1045. Gmel. p. 2977. 

 Penn. Brit. Zool. 1812. vol. 4. p. 9. pi. 6./. 1. 

 Herhst. Cane. 5. p. 152. t. 7./. 51. 

 Inhabits the Arctic Ocean. Is covered with stiff 

 hairs, and has one claw much larger than the other. 

 PI. 82. 



