114 DUBLIN NATURAL HISTOET SOCIETY. 



generally terminating in a set of filaments. Accessory appendage well 

 marked. 



\.—PMlougria rtparta {Koch, sp.). Plate XXIII., Pig. 1. 



Synonyms : Itea riparia {Koch), Itea Icevis {?) {Zaddach), Philougria 

 eeler {Kinahan, olim). 



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 

 antennse 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-roU. 

 I have found it with ova and young in the months of Pebruary to l^o- 

 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 (\'isible 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., Pig. 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 {Koch {?), Junior). Plate XXIIL, 



Pig. 2. 



Body smooth, shining, ovaL Telson truncately triangular ; the apex 

 nearly straight, deeply furrowed above, but not emarginate. Posterior 

 pleopods and ischium trigone- 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 groimds. 



Locality : hiUs 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. 



