PHILOUGRIA RIPARIA, 457 
excavated over the insertion of the posterior pleopoda 
or terminal appendages ; its middle portion is produced 
backwards, truncately triangular, and deeply emarginate 
at the tip. Under a lens the skin is found to be marked 
with minute semicircular incised lines, giving the appear- 
ance of a series of scales, as seen at Fig. nu’. The outer 
antennz appear to us to consist of only nine joints, the 
flagellum consisting of only the four terminal articula- 
tions. 
This species appears to be widely dispersed throughout 
Iingland and Ireland, although rare in the southern 
counties of the former. It has been taken near Dublin, 
Wexford, Cork, and Kerry by Dr. Percival Wright, 
and at Tyrone, Waterford, Portlaw, Kilkenny, and 
Wicklow (Prof. Kinahan). In Epping Forest and 
Chiselhurst, Kent; also at Plymouth; Polperro (in the 
gardens of the inn, not uncommon); Looe abundantly, 
among sticks by the river side. It is found in very 
moist places amongst all kinds of decaying matter, also 
amongst moist dead leaves, amongst wet ashes, and in 
moss, at the roots of trees. It runs with agility, buries 
itself deep in the ground, and generally congregates in 
numbers. It is very impatient of dryness, soon dying 
on exposure to air (Kinahan). It feigns death when 
disturbed, but does not attempt to roll itself in the least. 
Professor Kinahan found it with ova and young from 
February to November. 
