Cl, ASS I. CRUSTACEA. 
Ill 
Fam. IX. Liciads;. Leach’s MSS. 
Interior antenna: distinct. Stale of the tail double, with double foot- 
stalks. 
Genus 33. LIGIA. Fair., Latr., Bose , Leach, 
eternal antenna with the last joint composed of several other joints. 
*?•?• Lig. oceanka. Antennae as long as the body : back subseabrose. 
Gigiaoceanica. Fair. Sapp. Ent. Syst. 301. Leach , F.din. Encyel. vii. 406. 
—Supp. to Encyel. Brit. i. 128. Ligia Scopulorum. Leach, Edai. En- 
c ycl. vii. 406. Oniscusoceanicus. Linn. Syst. Nat. i. 1061. 
nhabits the rocky shores of the European ocean. The last joint of 
the antenna; varies much in the number of its segments, even in the 
two sides of the same individual. 
Fam. X. Oniscidje. 
Vienna: two. Styles of the tail four, the lateral ones biarticulate. 
* Body not capable of contracting into a bull. 
a. External antenna eig/U-jointed. 
Genus 34. PIIILOSCIA. Latr., Leach. 
•’’erne! antenna: with their bases naked; tail abruptly narrower than 
the body. 
f P’.G Phil. Museorum. Body variegated; sometimes pale brick-red. 
niscus Museorum. Scop. Eat. Cam. 1145. Oniscus sylvestris. Fair. 
Ent. Sysl. iv. 397. Pliiloscia Museorum. Latr. Gen. Crust, et Insect. 
'• 69. Leach, Edin. Encyel. vii. 406. — Supp. to Encyel. Brit. i. 428. 
nabits France, Germany, and England, under stones and mosses. 
Genus 35. ONISCUS of mdhors. 
inserted beneath the anterior margin of the head, on a proml- 
g ne nt part. ’ F 
P- !• On. Asellus. Above, obscure-cinereous, rough; the sides and a se- 
0n' 16S ^ orsa ^ spots yellowish. 
1 p Cus -^sellas. Linne, Latr., Leach. Oniscus murarius. Fabr. Supp. 
Inh f-' S ^ sL 30 °- 
r ^ Jlts rotten wood and old walls throughout the greater part of Eu- 
It was formerly used in medicine, and was supposed to cure agues, 
nnsunaptions, Src. but has now, like many other medicines, deserv- 
e ' J1 ,y grown out of fashion, and is rejected from the modern Pharma- 
copoeias. it is commonly called Pig’s-louse, Wood-louse, Millepede 
ni Carpenter. * 
