22 Messrs. G. S. Brady and D. Robertson on the 
which we propose to call var. teres, commonly in the river- 
outlets and salt-marshes of Northumberland and Durham, in 
the rivers Ouse (Yorkshire and Norfolk), Deben, Stour, Cam, 
Bure, Thames, Scheldt, and Meuse, in all theb roads visited 
by us except Wroxham, i in Lake Lothing and Breydon Water, 
and in the dykes about Whittlesea. The typical torose form 
we have not found at all north of Norfolk; but it occurs in all 
the broads known to us, except Barton, in Lake Lothing and 
Breydon Water, and in the river Bure: it thus appears to be 
peculiar to the East- Anglian district. It is worthy of note that 
thisspecies has not occurred to us at all in Scotland,except in one 
gathering from the Clyde near Dumbarton Castle (var. teres), 
though that it is not a strictly southern species is shown by 
its occurrence abun nun according to G. O. Sars, in Chris- 
tianiafiord. It is remarkable also that, though occurring 
Cytheridea inequalis, nov. sp. (Pl. IX. et 1-4.) 
wong as seen from the side, subtriangular ; greatest height 
tuated in the middle, and equal to two-thirds of the length ; 
EUR extremity broadly rounded, posterior broad, scarcely 
rounded: superior margin excessively arched, highest i in the 
middle, slopmg with a gentle eurve towards the front, more 
steeply behind, where it is obscurely angulated. Seen from 
above, lozenge-shaped ; greatest width in the middle, equal 
to half the length; extremities obtusely pointed; end view 
subtriangular, twisted. Right valve very much smaller than 
the left, its superior and posterior margins obtusely angu- 
lated in the middle; anterior margin fringed with a row of 
eight long and sharp. spines directed forwards and down- 
wards; posterior margin having at the lower angle one long 
and four smaller rudimentary spines: left valve devoid of 
spinous armature, and overlapping the right throughout its 
entire circumference. Surface of the shell polished, obscurely 
“ Crustacean Fauna of the Salt-Marshes of Northumberland and Durham” 
ver Ree Pitay. Transactions of N orthumberland a nd Durham, vol. iii. 
arapaces, I wasled to 
ae the imperfect specimens in Prof. Rupert Jones’ 8 collection to a elosel y 
allied ipee C. d ris (G. O. i to which it is indeed probable that 
one or two o Pak examples may Bea but his figures 
grs in the "Mora of the Tertiary Ento a clearly represent 
ideration. I Fir withdraw the specific 
nam: is, and revert to the ee adopted in my ‘ Monograph 
of the iod British Ostracoda,’ considering the form there called Cy- 
theridea torosa, and afterwards littoralis ,a8 av Yet (feres) of that origi- 
nally described by Prof. Rupert Jones. s. 
