SO ASTACUS. LOBSTER. Class V. 



Inhabits the crannies of rocks, in fresh 

 waters ; suspected by Linnaus to be the larva 

 of an Ephemera. 



[Accurately described by Dr. Shaxv. Ed. 



19. Mantis. 

 Mantis. 



C.Lin. $yst. 1054. No. 76. Gm. Lin. 299O. 



L. with short antenna ; short thorax, and two 

 pinnated substances on each side ; three pair of 

 claws with hairy ends ; the body long, divided 

 by eight segments ; two fins on each side of the 

 tail ; tail conoid, with spines on the margin. 

 Weymouth. From the Portland cabinet. 



20. Bernar- Cancer. Lin. Syst. 104g. Gm. 



DUS. 



Hermit. 



Lin. 2Q82. 



Herhst. Cane. ii. 14. t. 22. 

 f-6. 



C. with rough claws; the right claw is the 

 longer ; the legs subulated, and serrated along 

 the upper ridge ; the tail naked and tender, and 

 furnished with a hook, by which it secures it- 

 self in its lodging. 



This species is parasitic, and inhabits the 

 empty cavities of turbinated shells, changing 

 its habitation according to its increase of growth, 

 from the small nerite, to the large whelk. Na- 

 ture denies it the strong covering behind, which 

 it has bestowed on others of this class, and 



