348 MM. Chapman and Sherborn— Ostracoda of the Gault. 
made full use, while our special thanks are due to him for examining 
our material and verifying our determinations. 
In the appended Distribution Table the numbers in the general 
columns refer to the approximate number of specimens found in the 
whole of the residual material after washing from 4 to 6 cubic inches 
of the rock. 
The forms which appear to be new we now proceed to describe ; 
and give (on pp. 346 and 347) a table showing at a glance the zonal 
distribution of the forms found in the Gault, and additional forms not 
found by us, but recorded elsewhere. 
CYTHERE ? SPINIFERA, sp. nov. Pl. XIV. Fig. 3. 
A smooth carapace, strongly arched on the dorsal, straight on the 
ventral side; with a projecting spine on the ventral margin at the 
hinder end. Hinge-line a simple flange. 
Distribution. —Hight valves, from Zone x. and Zone xi., at 50 feet, 
45 feet, 40 feet, 35 feet, 30 feet, and 25 feet from the top of the 
‘Gault at Folkestone. 
CYTHERE LINEATOPUNCTATA, sp. nov. Pl. XIV. Fig. 4. 
A strong catapace, much swollen at the ventral margin and over- 
hanging; with coarse square punctations arranged in somewhat 
parallel lines. A central ridge, not very strongly developed, runs 
down the length of the shell. 
Distribution—One valve only, from Zone iv. of the Folkestone 
Gault. 
‘CYTHEREIS TRIPLICATA, Rom. var. lineata, var. nov. Pl. XIV. Fig. 5. 
These specimens possess the general form of C. triplicata, but 
have each of the lobes or ridges delicately ornamented with three or 
four longitudinal raised strie. 
Distribution—Two specimens, one with united valves from Zone i. 
5 feet from the base, and the other from Zone xi., 12 feet from the 
top of the Folkestone Gault. 
CYTHEREIS RUDISPINATA, sp. noy. Pl. XIV. Figs. 6, 7. 
Closely allied to the many forms of Cythereis from the Cretaceous 
formation, and differing therefrom by having the three parallel 
ridges of curious and characteristic spines, which are spreading and 
flat at the apex, and in some specimens assuming large and pro- 
nounced mushroom-shaped prominences. 
Disiribution.—Hight valves from Zones i. (5 feet from base) ; 
il. (11 feet from base); v., and xi. (55 feet from the top) of the 
Folkestone Gault. 
CYTHEREIS EXCAVATA, sp. nov. Pl. XIV. Fig. 8. 
Subquadrate, with an irregular front, just below which is a 
fenestrated much-raised ridge. The whole surface coarsely reticulate ; 
rising up towards the hinder part of the carapace, standing away 
from the true margins, and terminating about seven-eighths from 
the front in a sharply defined edge. 
Distribution.—One valve orfly, from Zone ix. of the Gault of 
Folkestone. 
” 
