MODERN SYSTEM. 
P 
considerable dimensions. The abdomen is naked and slender, being 
covered merely with a skin of a delicate texture ; but its extremity > s 
furnished with appendages, by means of which it secures itself within 
the shell of which it makes choice. It is really astonishing with 
w hat facility these animals move, bearing at the same time the shell* 
which is destined to preserve die body from injury and to guard them 
from the attacks of fishes, which would otherwise devour them. All 
the species are termed indiscriminately Soldier-crabs and Hermit' 
crabs, from the idea of their living in a tent, or retiring to a cell. 
Sp. 1 . Pag. Streblanyx (common Soldier-crab). Arms hairy, muricated, 
the left largest; hands subcordate, fingers broad. 
Cancer Bemhardus of Pennant and othei • English authors. Pagurus Strc- 
blonyx. Mai. Podoph. Brit. tab. Qd.jig. 1 £f‘i . 
Inhabits the European ocean, and is very abundant in the British seas* 
inhabiting various kinds of univalve shells, changing its habitation 
as it grows. Pagurus arancifonnis, Edinb. Encyd. vii. 396, is merely 
the young of this species. 
Division II. — Tail on curb side with fotiaceous appendages, forming with 
the. middle tail-process a fan-like fin. 
a. Interior antenna with very long footstalks. 
Pam. II. P.U.IM RID/F.. Leach. 
External antenna setaceous, and very long: legs ten, alike and simple. 
Genus 20. PALIN bltl'S. Dald., Fabr., Lam., Latr., Bose, Leach- 
The animals of this genus have the power of producing a sound 
by rubbing their exterior antennae against the sides of the projecting 
clypeus. 
Sp. 1. Pul. vulgaris. 
Astacus honiarus. Pam. Brit. Zool.iv. tG.pl. 11. Leach, Mai. Podoph- 
Brit. tab. 30. 
Inhabits the European ocean. It is commonly eaten in London, and is 
sometimes denominated Spiny-lobster or Sea Cray-fish. 
Pam. III. Galatead,e. 
External antenna very long and setaceous : legs ten, anterior pair didaC- 
tyle, fifth pair spurious. 
Genus 21. POUCF.LLANA. T-am., Latr., Bose, Leach. 
External double palpi with the first joint of the internal footstalk di' 
latcd internally: shell orbiculate subquadrate. 
Sp. l. Por. plutychdes. 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 pb*' 
tycheles. Latr. Leach, Edin. Encyd. vii. 
