~I 
Or 
Land and Fresh- Water Crustacea around Edinburgh. 
ISOPODA. 
(Aquatie.) 
ASELLID&. 
Asellus aquaticus (Linné). 
1743. Oniscus aquaticus, Linné, Syst. Nat., ii., p. 1061. 
1764. L’ Aselle, Geoffrey, Ins. Paris, vol. ii., p. 672, t. 22, fig. 2. 
1868. Asellus aquaticus, Bate and Westwood, Joc. cit., vol. ii., p. 343, 
Habitat—Common among weeds in ponds, lakes, canals, 
and slow-running streams. Very common in the Union 
Canal, near Gilmore Place, Edinburgh. Sir J. Dalyell 
speaks of it occurring “in remarkable profusion in a pond 
at Red Braes, in the immediate vicinity of Edinburgh.” 
There are no records of it as a post-Tertiary fossil in Scot- 
land. 
Terrestrial (or Afro-spirantia). 
ONISCIDE. 
Ligia oceanica (Linné). 
1735. Oniscus oceanicus, Linné, Syst. Nat., ii., p. 1061. 
1793. Ligia oceanica, Fabricius, Ent. Syst. Suppl., p. 301. 
1868. -,, 33 Bate and Westwood, Joc. cit., vol. ii., p. 444. 
Habitat—Shores of the Firth of Forth, usually a little 
beyond, but sometimes within, high-water mark. Mr David 
Robertson has taken the young on stones at low water. I 
once saw a large specimen running across the footpath on 
the low Granton Road, east of the west breakwater: it had 
probably lost its way. It is a common species all round our 
shores, and easily distinguished from other land Isopods by 
the uropods being each furnished with two elongated rami. 
The joints of the external antennz are numerous (18 to 19): 
the fourth and fifth joints are much longer than the others. 
Philoscia muscorum (Scopoli). 
Oniscus muscorum, Scopoli, Entom. Carniol., p. 1145. 
1802. Philoscia ,, Latreille, Hist. Crust. et Ins., vii., p. 43. 
1868, ‘a by Bate and Westwood, Joc. cit., ii., p. 450, 
Asellus, 
Geoffrey. 
Ligia, 
Fabricius, 
Philoscia, 
Latreille, 
