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PROCEEDINGS OF SOCIETIES. 
generally terminating in a set of filaments. Accessory appendage well 
marked. 
1. —Philougria riparia (Koch, sp.). Plate XXIII., Fig. 1. 
Synonyms: Itea riparia (Koch), Itea Iccvis (?) (Zaddach), Philougria 
celer (Kinahan, dim). 
Body smooth and shining, elliptical; head oval; antennal plate at¬ 
taining to frontal line, its external angles produced as small lobes be¬ 
neath the orbits; internal antennae small and inconspicuous; external 
antennae of moderate length, carried folded at an angle. Telson deeply 
excavate over insertion of posterior pleopods, medianly produced, trun- 
cately triangular, deeply emarginate. 
Length, *15 inch. 
Colour: uniform claret-brown; under the lens, most exquisitely 
marbled with white. 
Habits: runs with great agility; buries itself deep in the earth; 
very impatient of drought; feigns death, but does not even semi-roll. 
I have found it with ova and young in the months of February to No¬ 
vember. 
Habitat: very moist places, among decaying vegetable matter, at 
roots of trees; under moss everywhere. 
Localities: Dublin (Wexford, Cork, Kerry, E. P. W.), Tyrone; 
Waterford; Portlaw, rather rare; Kilkenny; Wicklow; Queen’s County. 
England:—London; Kent; Plymouth, not so common; Polperro, Corn¬ 
wall, not uncommon. 
The young (?) specimens have the head slightly scabrous. A number 
of fine hairs (visible under an inch glass) are scattered over the rings. 
The elliptical outline of the entire animal, its smaller size, the cha¬ 
racters of the telson and of the skin (Plate XXIII., Fig. 1 /), which 
here is without pits, distinguish it from Ph. vivida, with which it might 
be confounded. 
2.— Philougria vivida (Koch, sp.). 
Syn.— Itea vivida (Koch), Itea nana (Kochi?), Junior). Plate XXIII., 
Fig. 2. 
Body smooth, shining, oval. Telson truncately triangular; the apex 
nearly straight, deeply furrowed above, but not emarginate. Posterior 
pleopods and ischium trigono-subulate. 
Colour: Claret-brown; under the lens, marbled with white. 
Length: *25 inch. 
Habits: runs with great agility; does not bury itself; less impatient 
of moisture than Ph. riparia. 
Habitat: under stones and amidst moss on the high grounds. 
Locality: hills and high ground, about Portlaw, county of Waterford, 
where I met this species in great abundance in March, 1858, even in 
the midst of snow. 
The superior size and the robust rotundity of this species distin- 
