211 
Dimensions . — The length is seventeen, the breadth thirteen, and the 
thickness five, millimetres. 
lielations and Differences. — ^The shape of this species connects it 
with my C. Puzosiana, from which it differs by its thinner and less distinct 
strim. 
Horizon and Localities.— li is found in a dark-grey limestone in the 
Ichthyodorulite llange on the hanks of the Kama, associated with Pleuroto- 
maria filosa,^oy\\ 
Genus — EDMONDIA, L. G. de Koninck. 
Edmondia ? STRiATO-cosTATA, F. McCoy. 
PI. XVIII, Pig. 3. 
Fullastra? striato-costata, F. McCoy, 184)7, Ann. Mag. Xat. Hist., XX, p. 305, pi. 14, fig. 3. 
The hinge of this species could not he found, and I have placed it in 
the genus Edmondia , on account of its external resemblance to some species 
of that genus. It is an elongated, oval, slightly convex shell, nearly twice 
as long as broad. Its beaks are small, and j)laced very anteriorly. Its 
external surface is ornamented with a number of concentric wrinkles of 
growth, themselves covered with fine, parallel strim, visible only with the aid 
of a lens. 
Dimensions . — The length is ten, and the breadth six, millimetres. 
Relations and Dfferejices . — This sj^ecies differs from young individuals 
of E. unioniformis, J. Phillips, by the strim ornamenting its lines of growth; 
it differs from other related species by its small size and its more oval form. 
Horizon and Localities. — -According to McCoy this species is common 
in the shales of Dunvegan. I know only a single specimen, and that was 
found in a greyish-olive argillaceous limestone at Burragood. 
Edmondia nobilissima, L. G. de Koninck. 
PL XX, Fig. 2. 
This is a large and beautiful sub trigonal shell, a little longer than 
broad, with rather thick beaks recurved forwards, and touching each other. 
The anterior margin is slightly hollowed, and prolongs itself so as to form 
2 F 
