Land and Fresh-Water Crustacea around Edinburgh. 79 
bounding the south of a highway between Leith and Porto- 
bello; it was fairly common at this place. This pretty 
Isopod has been recorded from Banff by Thomas Edward, 
and from Ayrshire by Mr D. A. Boyd of West Kilbride. 
Porcellio armadilloides, Lereboullet. 
1853. Porcellio armadilloides, Lereboullet, Mem. Loc. Nat. Hist. 
Strasbourg, vol. iv. 
1868. m Fe Bate and Westwood, Joc. cit., p. 485. 
Habitat—Under stones, etc., widely distributed. This is 
easily distinguished from the other British species of Por- 
cellio by its habit of rolling itself into a ball, thus showing a 
close resemblance in habit to Armadillo vulgaris. I have 
obtained specimens of this Porcellio under stones at the foot 
of Salisbury Crags. I first observed it in Lanarkshire in 
1885, and afterwards in the vicinity of the Rothesay 
Aquarium, where it was common. Mr David Robertson, 
F.L.S., has received specimens from Mr John Smith, Kil- 
winning, Ayrshire. Another species—Porcellio pruinosus, 
Brandt—described by Bate and Westwood as “one of the 
commonest of our wood-lice,” and recorded from Banff by 
Thomas Edward, has not, so far as I know, been observed in 
our district. This may partly be due to its having been 
confounded with P, scaber, “ which it closely resembles,’ but 
“from which it is at once distinguished by its more elongate 
form, less rugose surface, and especially by the narrowness of 
the tail, in which respect it approaches Philoscia.” It is of a 
uniform mouse-grey colour, and if examined with a lens, is 
seen to be marked with white. 
Armadillo vulgaris, Latreille. 
1802. Armadillo vulgaris, Latreille, Hist. Nat. Crust. et Ins., vii., 
p- 48. 
1840. Armadillidium vulgare, M. Edwards, Crust., iii., p. 184. 
1868. Armadillo vulgaris, Bate and Westwood, loc. cit., p. 492. 
Habitat Under stones, etc., widely distributed, and 
probably of frequent occurrence throughout Scotland. The 
Armadillo, 
Latreille, 
