« X 50 
TAB. I. 
Fig. 1 . Cythere Hilseana. 
Left valve, outside 
Detritus. 
Charing. 
(5 X 50 
Right valve, outside 
33 
c X 50 
Right valve, inside 
Gault. 
Folkstone. 
c XlOO 
Right valve, hinge 
?? 
?? 
c"X 50 
Right valve, dorsal edge 
5? 
5? 
c"X 50 
Right valve, ventral edge 
?? 
5? 
X 50 
Left valve, inside 
5) 
35 
(T XlOO 
Left valve, hinge 
>5 
33 
^ X 50 
Right valve, outside 
.3? 
e XlOO 
Punctations (of fig. \e) . . . 
?? 
33 
/ X 50 
Perfect carapace, anterior aspect 
Detritus. 
Charing. 
g X 50 
Perfect carapace, dorsal aspect, seen obliquely 
5? 
5? 
a X 50 
Fig. 2. Cythere punctaiula. 
Old, perfect, dorsal aspect 
Greensand. 
Warminster. 
^ X 50 
Old, left valve, outside . . . 
Gault. 
Folkstone. 
c X 50 
Immature, right valve, outside 
?? 
•3 
c? X 50 
Immature, right valve, inside 
33 
(I X 50 
Immature, right valve, dorsal edge 
>5 
33 
X 
O 
Old, left valve, inside 
33 
e X 50 
Old, left valve, dorsal edge 
35 
/ X 50 
Young, right valve, outside 
35 
Leacon Hill. 
/ XlOO 
Young, central surface (of fig. 2 f) 
33 
33 
g XlOO 
Immature, central surface . 
33 
Folkstone. 
h XlOO 
Immature, central surface 
33 
33 
^ XlOO 
Old, central surface 
Detritus. 
Charing. 
X 
o 
Worn, perfect, left valve upwards 
Greensand. 
Warminster. 
h X 50 
Immature, perfect, dorsal aspect 
Gault. 
Folkstone. 
/ X 50 
Old, perfect, ventral aspect 
Detritus. 
Charing. 
X 50 
Old, perfect, anterior aspect 
Gault. 
Folkstone. 
n X 50 
Var. virginea, perfect carapace, placed 
obliquely, right valve upwards 
Chalk. 
Gravesend. 
