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MODIOLA parallella. 
TAB, IX.— Upper right hand figure. 
Spec. Char. Shell transverse,, anterior and posterior 
sides parallel ; covered with transverse furrows. 
Nearly twice as broad as long; acutely convex ; beaks 
rather sharp; transverse furrows or striae few, diverging 
from the beak ; inferior margin straight, short, and almost 
at right angles with the sides, which are nearly straight 
and parallel. 
I found this in a quarry near Maidstone ; it is in a darkish 
Limestone which may perhaps be compared to the Blue 
Lyas of Bath ; it is only the impression of the outside. I 
have met with no other specimen of this species. 
MODIOLA elegans, 
TAB, IX .— Left hand upper figure 5 middle 
figure 9 and lower figures , 
Spec. Char. Oblongs gibbous, inferior margin 
straight, dentated; anterior side covered with 
transverse furrows; posterior side swelling, 
smooth, with a few transverse furrows near the 
base. 
Generally about twice as long as broad, moderately 
convex, beak a little curved ; striae neat, close, a little un- 
dulating, passing from the beak over the most prominent 
part of the shell, and diverging over the anterior side to the 
