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more depressed, the lunule more obsolete, and the outline more 
ovate than in that shell. It bears no resemblance to A. depressa 
Quen., and is a different species. 
Geological position and locality, the Clypeus Grit, Rodborough 
Hill, where it is moderately abundant. 
Cuemnitzia. (Qy.) PI. V, fig. 8. 
Shell large, whorls convex, costated anteriorly ; coste rather 
large. The fragment figured indicates a shell of considerable’ 
size, but as the external mould only has been discovered, a full 
description cannot be given, but it will suffice to call attention 
to a very fine species. 
From the Clypeus Grit of Rodborough Hill. 
CrritHium ciypeatum. PI. V, fig. 9, 9a. 
Shell turrited, volutions numerous, narrow, about twice as 
wide as high, expanded posteriorly, nearly straight anteriorly, 
with numerous encircling lines; aperture oblique, narrow, canal 
produced ; height of entire shell about 18 lines, diameter of last 
whorl 3 lines. 
Geological position and locality, the Clypeus Grit of Rod- 
borough Hill, where it is rare. 
EXPLANATION OF PLATES. 
Pruate L 
1 Trichites undulatus. Lyc. (reduced). 
" " Side view, (reduced). 
Puate II. 
Trichites undulatus. Another example, (reduced). 
Prate III. 
Trichites nodosus. M. & L. View of the interior of the right valve, 
(slightly reduced). 
Prater IV. 
Phasianella costata. 
la " n Whorlenlarged, showing coste and longitudinal striz. 
