< ii \ rui. 



Th- L '(/// m<ena* comprises a voracious, fierce, ami contention* 

 race, involved in perpetual warfare, whereof many mutilations of tliom? 

 escaping \\itli life are home as undoubted evidence of peril. Henre. 

 among mi-eellaneou-. collections, are found specimens variously im- 

 paired : ami if tin- whole are confined in the sauu 1 vessel, those incessant 

 conflicts, ti-mliiiir to universal ndtrniination, after farther aggravation-, 

 will leave one only as tin- victor. 



Knt ire genera would disappear, did not the energies of Nature heal 

 their otherwise deadly wound*. 



Amid-t such energies, some an- always directed to the restoration 



of perfee t ion ; whence, although the precursor be itself ilefeetive. its 



successor ia perfeet, as will be diseoxered on exuviation. Hut it niu.-t 



: >ser\e.l. that all subjecta are liable, to accidental imperfections of 



parts, or in dimensions. 



A ppeeimeii, whieh was deU-ctive of the rijrht < law. ha\inir ea-t it- 

 shell, it came in with the wanting claw now perfect ; but this new or^ran 

 wa somewhat -mailer than its fellow. Plate XXXVII. (L's. '!. \. On 

 another exuviation, the flaws came in nearly e<pial. 



A specimen, Plate XXXVII. liir. ">. which had been mutilated of 

 four limbs, and half the forceps of the left claw, cast this shell on Oc- 

 tober 8, and came in entire with tin- whole complement of limbs. \<> 

 gether with the wanting pineer, now white. Fi^. C. 



A small speeiinen having been left somewhat incautiously in the 

 vessel of one rather larger and stron. mutilated of the rijrht 



claw and three limbs of the same side, and of limb on the left side. 

 Notwithstanding this extraordinary prhation, it cast it- -lull, the new 

 animal, to my surprise, coining in with all the limbs in perfeet ion. 

 Plate XXXVII. fig. 7, cast shell, back ; fig. 8, breast ; fig. 0, new 

 perfect animal. 



As is well known, low papilla 1 rising from the remaining stump an- 

 nounce regeneration in Ueshy reproductions. This is a fact so familiar, 

 and I may say of such uniform occurrence, that, without adverting to 

 the circumstances, I conjectured that papilla- were actually rising here, 

 from the rudiments of the defective organs. But let us rememl>er that 



