652 CLASS X. 
Philoscia Latr. External antenne with eight joints, naked at 
the base. Segments of tail abruptly narrower behind the last 
segment of trunk. 
Sp. Oniscus muscorum Cuv. 
B. Ligiea. Basal joint of last pair of abdominal feet slender, 
elongate, exsert, terminated by two long styles. External antennee 
terminated by a seta composed of several (twelve to twenty) joints, 
long. 
Ligia Far. 
Sp. Ligia oceanica Fasr., BAsteR Natuurk. Vitspann. Ul. Tab. XIII. fig. 4, 
Drsmar. Crust. Pl. 49, figs. 3, 4;—Ligia italica Fasr., Guiry Iconogr., 
Crust. Pl. 31, fig. 5, &c. These animals live on the sea-coast, but often 
leave the water and climb on stones, piles, &c. This genus forms the 
transition to the water-onisci. 
Some species, in their antenne resembling Ligia, have at the last 
abdominal feet a bifid basal piece, and at the extremity of these two 
pedicles is a filiform appendage. They live under stones or under 
moss, in moist meadows, in decaying wood, &e. They form the 
genus Ligidium Branvt, Zia Kocu, in HERRICH-SCHAFFER Deutsch. 
Ins. Heft 180. 
Sp. Ligidium Personii BRanvt, Oniscus agilis PeRSoon, PanzeR Deutschl. 
Ins. Heft 9, Tab. 24, &c. 
Family XIX. Asellota. Antenne four, distinct. Terminal 
appendages of last pair of abdominal feet produced beyond the 
body like a tail. Last segment of tail large, scutiform. 
A. First pair of feet, either similar to the rest, or thickened at 
the apex, and with hook single. 
+ Four antennz unequal, external much longer than internal. 
* All the feet similar, terminated by short double claw. 
Oniscoda Latr. (Janira LEACH). 
Jeridina Epw. 
Sp. Janira Nordmanni RatuKy, Fauna der Krym, p. 388, Tab. vi. figs. 
I—5. 
Jera LEACH. 
Sp. Jera nivalis KRoryEr, Griénland’s Amfipoder, Tab. rv. fig. 21. 
