DUBLIN NATUEAL HIST0EY SOCIETY. 
195 
2.— Philoscia Couchii, n. s. 
Corpore lseve, splendido. Eronte recto. Telson lineare-triangulari; 
apice obtuse-truncato, setis validis armato; lateribus paululum excava- 
tis. Pleopodis posterioribus; Ischio falciformi-subulato. Appendice 
vix \ iscbii longitudinem sequante. 
Sub lapidibus algisque marcescentibus ad maris marginem ad “ Tal- 
land Cove,” juxta Polperro, Cornwall, Angliam hasc species a me re- 
perta fait. Yiro clarissimo Jonathan Couch, P. L. S., qui de animalibus 
marinis regionis Cornubiensis cognoscendis optime meruit, dicatam esse 
velim. 
PHILOSCIA. 
Pody flattened; no lateral or median lobes to carapace; internal 
antennae three-jointed. Peduncle of external antennae rounded, unlobed. 
Tige three-jointed. Posterior pleopods (last pair of false feet) attached 
to exterior margin of telson, uncovered. Peduncle (basis) quadrilateral. 
Ischium trigonal, and, as well as accessory appendage, uncovered. 
Species 1.— Philoscia muscorum ( Latreille ). 
Body smooth and shining; head transversely elliptical, arched in front; 
no true lateral or median lobes; internal antennae inconspicuous; ex¬ 
ternal antennae densely hairy; abdomen much narrower than cephalo- 
thorax; telson (last ring) broadly triangular; apex acute; posterior 
pleopods (abdominal false feet); Ischium trigonal, spinous along edges. 
Accessory appendages more than half length of ischium, and nearly at¬ 
taining to its summit. 
Colour: fulvous, with dark black patches and white blotches. A 
pale salmon-coloured variety is not uncommon. Habitat: dry places, 
under leaves, stones, moss; also near sea-shore very common. 
Habits: runs rapidly; seeks sunshine; does not roll into a ball; 
feigns death. 
Localities: Dublin, Wicklow, Meath, Wexford, Cork, Waterford, 
Tyrone, and probably all over Ireland. England—Middlesex, Essex, 
Kent, Plymouth, Devonshire not so common, Cornwall, Polperro, &c. 
Species 2.— Philoscia Couchii ( Mihi ) n. s. Plate XXIII., Eig. 4. 
Body smooth, elliptical; head somewhat rounded, nearly straight 
across front; beneath orbits a small lobe, arising from superior margin 
of antennal ring. Internal antennse inconspicuous; external antennae 
hairy; tige long and narrow. Abdomen narrower than cephalo-thorax. 
Telson (last ring) narrow, linearly triangular; apex rounded, and fringed 
with stiff bristles; sides excavate. Posterior pleopods (last pair abdo¬ 
minal feet); ischium elongate, falciform, subulate. Accessory appendage 
scarcely one-fourth the length of ischium; in other respects as Philoscia 
muscorum . 
Colour: lead gray, uniform to the naked eye. 
Habitat: under stones, and amid decaying sea-weed at high-water 
mark; local. 
