Terrestrial Isopoda (Woodlice) of Yorkshire. 101 
and varied places, at the roots of grass in the open fields, under 
dead leaves in damp places, under stones along stream sides, 
among moss in wet woodlands or boggy places, it is also 
common on rockeries, and in most gardens under creeping 
plants, etc. 
It would be useless to give a list of the places from which 
[ have obtained this species, sufficient to say is, that it occurs 
commonly in Airedale, Whariedale, Ribblesdale, Lunedale, 
Nidderdale, Calderdale, Scarborough and Bridlington districts. 
Mr. R. S. Bagnall found it on the cliffs at Whitby, and Dr. 
G. S. Brady records it for the Sheffield district. 
T. PUSILLUS var. VIOLACEUS Schobl.—This is a beautiful 
form of a violet colour. J found three specimens in Grass- 
wood, and one at Linton, on the Yorkshire Naturalists’ Union 
Excursion, 1913, and four in Hackfall Woods, April 1914. 
TRICHONISCUS PYGMZUS G. O. Sars.—This is one of the 
smallest endemic species, and is apparently widely distributed. 
It was discovered by Alex. Patience in the Clyde area, and 
also in the North of England by Mr. R. S. Bagnall, almost 
simultaneously in 1906. 
Mr. R. S. Bagnall found it under deeply embedded 
stones on the cliffs at Whitby on March 2oth, 1912, and he 
informs me that he has taken it recently at Ravenscar, and 
Rombaldskirk. I have obtained about twenty specimens 
from my own garden in Bradford, from under Saxifrages, 
and from a cold frame in which I wintered violas during 
1913-14. Most of the specimens taken in the frame, were 
obtained under slices of raw potato put there as snail traps. 
Trichoniscus stebbingi Patience.—This species has been 
taken in greenhouses in Northumberland and Durham and also 
in the open in the Clyde area. Up to the present time I know 
of no Yorkshire records for it. 
Genus TRICHONISCOIDES G. QO. Sars. 
TRICHONISCOIDES SARSI Patience.—This species was first 
recorded as British by R. S. Bagnall in The Zoologist 
for April, 1912, from a specimen obtained under deeply em- 
bedded stones on the cliffs at Whitby on March 2oth, 1912. 
He informs me that he has since taken it on the cliffs near Whit- 
burn, County Durham, thus further establishing it as a British 
species. 
TRICHONISCOIDES ALBIDUS Budde-Lund.— Up to the present 
the only Yorkshire records for this species that I am aware 
of are :—Eccleshall Wood, Sheffield, by Dr. G. S. Brady in 
the British Association Hand Book (Zoology) Sheffield meeting, 
Ig10, and under stones on the Whitby Clifis, Mr. R. S. Bagnall, 
March, 1912 (Zoologist, April, 1912). 
1916 Mar. 1, 
