ATTHEYELLA. 59 
twisted at the base, and the larger pair are shortly 
plumose. Length 3'srd of+an inch (‘77 mm.). 
Male unknown. 
A very few specimens only were found in an old 
engine-pond at Murton Junction, near Sunderland ; 
and a single example, which appears to belong to the 
same species, occurred in a gathering sent to me by 
Mr. David Robertson from an old canal at Peterhead. 
The fifth foot of this latter specimen is represented at 
Pl. XLIL, fig. 18, and differs slightly from that of the 
Murton specimens. More recently (July, 1877) [have 
found A. spinosa in a gathering taken amongst weeds 
in the rivera little west of Pwllheli, Caernarvonshire, a 
situation where it is quite possible that sometimes the 
water may become brackish, though at the time of 
my visit it was not perceptibly so. I at first sup- 
posed these specimens to belong to Fischer’s Cantho- 
camptus horridus, to which they bear a very close 
resemblance, but Fischer’s figure distinctly represents 
the first foot with a much elongated inner branch, 
from which I infer that it cannot be identical with the 
present species, which seems to be generically distinct 
from Canthocamptus. I propose, therefore, for its 
reception a new genus named after my friend Mr. 
Thomas Atthey, of Gosforth, near Newcastle, to 
whom we are indebted for the discovery of the next 
species (A. cryptorum), and who, by his intelligent and 
unwearying labours amongst the fossils of the Nor- 
thumberland coal-field, together with an unsurpassed 
manual skill in the preparation of his specimens, has 
done so much for that branch of science. 
