650 CLASS: X; 
Praniza Leacnu. Head triangular, narrower than thorax. Man- 
dibles not exsert. Trunk in females consisting of only three 
segments, the last three being confluent, and forming a single 
oval scutum broader than the preceding segments. 
Sp. Praniza cerulata, Oniscus marinus SLABBER, SLABBER Natuurk. Verlust. 
Tab. 1x. figs. 1, 2 (copied in Lncycl. méth., Ins. et Crust. Pl. 329, figs. 24, 
25), Monracu Trans. Linn, x1. Tab. tv. fig. 2, &e. 
Compare on this genus J.O. WEestwoop, Ann. des Sc. natur, Tom. xxv. 
1832, pp. 316—332, Pl. 6. 
Family XVIII. Oniscides. Two middle antenne very short, 
of only one or two joints. Last segment of tail short, with the 
appendages of the last pair of caudal feet concealed or styliform. 
Comp. J. F. Branpt Conspectus Monographie Crustaceorum Oniscodorum 
LATREILLU, Bulletin de la Société invp. des Natural. de Moscou, vi. 1833, 
pp. 171—193, Tab. Iv. figs. 6—21. 
These Jsopods may be named Land-Asselli, for although some of 
them keep to the sea-shore, they do not live in water. The most 
live under stones, bark of trees, in chinks of walls, &e. They gnaw 
various substances. At night especially they seek their food, which 
consists principally of vegetable matters. 
A. Oniscinea. Basal joint of the last pair of abdominal feet 
short, not produced beyond the last segment of abdomen. Antenne 
geniculate, with from six to nine joints (the five basal joints thicker, 
the terminal seta with one or two, three or four joints). 
Tylos Latr. Hxternal antenne moderate, with nine joints, the 
four terminal joints forming a short seta. Last pair of abdominal 
feet lamellose, concealed under abdomen. Body contractile into a 
ball. 
Sp. Zylos Latreillii Aupovuin, Tylos armadillo Larr., Cloporte SAvIGNy, 
Descer. de UV Egypte, Crust. Pl. 13, fig. 1, Guirin Jconogr., Crust. Pl. 31, 
fig. 4, Epwarps, Cuv. R. Anim. éd. iliustr., Crust. Pl. 70, fig. 2. 
The first four pairs of abdominal feet have a broad quadrangular append- 
age, in which longitudinal cavities with blind branchings are found. They 
open at the inferior margin by a row of small foramina, and take up air 
for respiration. The animal lives on the coasts of Egypt and Algiers. 
Armadillo Latr. External antenne with seven joints. Styli- 
form appendages of last pair of feet short, not prominent. Body 
contractile into a ball. 
