S2 



MODERN SySTEiM. 



considerable dimensions. Tlie al)domen is naked and slender, being 

 covered merely with a skin of a delicate texture; but its extremity is 

 furnished with appendages, by means of which it secures itself within 

 the shell of which it makes choice. It is really astonishing with 

 what facility these animals move, bearing at the same time the shell, 

 which is dcaiined to preserve the body from injury and to guard them 

 from the attacks of fishe;-, which would otherwise devour Ihcm. All 

 the species are temied indiscriminately Soldier-crabs and Hermit- 

 crabs, from the idea of their living in a tent, or retiring to a cell. 



Sp. 1. Pag. Strehlonyx (common Soldier-crab). Arms hairy, muriciUed, 

 tjie left largest; hands subcordatc, fingers broad. 



Cancer Bernhardus of Pemianl and other English authors. PagurusStre- 

 blonyx. Mul. Fodoph. Brit. tub. 26. Jig. 1 4-4. 



Inhabits the European ocean, and is very abundant in tiie British seas, 

 inhabiting various kinds of univalve shells, changing its habitation 

 as it grows. Pagurus araneiformis, Edinb. Encyc /. v'n' 306, is merely 

 the young of this species. 



Division II. — Tail on each side with foliaceous appendages, forming uilh 

 the middle tail-process a fan-like fin. 



a. Interior antennm with very long footstalks. 



Fam. II. Palinuridje. Leach. 

 External antenna setaceous, and very long: legs ten, alike and simple. 

 Genus 20. PALINURUS. Bald., Fabr., Lam., Lafr., Bosc, Leach. 

 The animals of this genus have the power of producing a sound 

 by rubbing their exterior antennic against the sides of the projecting 

 clypeus. 

 Sp. 1. Pal. TC-lgaris. 

 Astacus homarus. Penn. Brit. Zool. iv. ^6.pl. 11. Leach, Mai. Fodoph, 



Brit. tab. 30. 

 Inhabits the European ocean. It is commonly eaten in London, and is 

 sometimes denominated Spiny-lobster or Sea Cray-fish. 



Earn. III. Galatea Dx. 



External antcnnre. very long and setaceous : kgs ten, anterior pair didac- 

 tyle, fifth pair spurious. 



Genus 21. PORCELLANA. Lam., Latr., Bosc, Leach. 



External double palpi with the first joint of the internal footstalk di- 

 lated internally : shell orbiculate subquadrate. 



Sp. 1. For. platychcles. Anterior margin of the shell with three entire 

 teeth : claws very large and much depressed : wrists internally den- 

 ticulated; hands externally deeply ciliated. 



Cancer platycheles. Penn. Brit. Zool. iv. 6. pi. 6. & 12. Porcellana pla- 

 tycheles. Latr. Leach, Edin. Enc^cl. vii. 



