356 Mr. R. Gurney on certain 
The first pair of antennz of the female are longer and 
more slender than in C. laticaudata, and the postabdomen 
is not so broad. The male is readily distinguished by the 
protuberance of the rostral region of the head. 
So far as I am aware, C. setosa, which was first described 
in 1890 from specimens taken in the neighbourhood of 
Moscow, has since that time only been recorded from 
Sweden and from Plén,in Holstein. Prof. Lilljeborg states 
that it is very rare in Sweden, though widely distributed, 
being found in places with rich vegetation, particularly 
Lemna, in company with C. laticaudata and C. rotunda. 
The latter has never been found in this country since 1850, 
when Baird described it in his ‘ Natural History of British 
Entomostraca,’ and it is very probable that his description 
refers to C. laticaudata. 
3. Kurzia latissima, Kurz. 
This species-was found for the first time on Aug. 26, 
and was common on that day in a small patch of Hypnum, 
which reached to the surface of the water. This patch was 
little more than a yard in diameter, and the Kurzia were 
almost confined to it, since none were found in the sur- 
rounding marsh. On subsequent days occasional specimens 
were taken in the neighbourhood of this spot, but the species 
rapidly decreased in numbers, and only two individuals were 
found on Oct. 7 in spite of assiduous search. 
Kurzia latissima is a rare species, but has an extremely 
wide range, being recorded from Sweden, Bohemia, Russia, 
Switzerland, Brandenburg, Central Asia, United States, 
Paraguay, Brazil, and Argentina. It is readily distin- 
guishable by its broad outline and its very narrow post- 
abdomen. The ephippial area is not marked off from the 
rest of the shell by a “line of weakness,” but is dark 
brown in colour and marked with fine brown dots. The 
male differs little from the female either in shape of shell or 
of postabdomen. 
CopEPopDaA. 
4. Nitocra simplex, Schmeil. (Fig. 2.) 
Syn. NV. mudlert, Van Douwe, Zool. Anz. xxviii. 1905, p. 434. 
Nitocra hibernica (Brady) is widely distributed in the 
Norfolk Broads, both in those which are quite fresh and 
also in the rather brackish waters of the Hickling region ; 
and N. spinipes, Boeck, is also found, though rarely, in the 
