46 oo Mn. Martin's Account of fome Species of 
a long perpendicular flit or fent. Its greateft breadth is at the hinge, 
from which it gradually diminithes to a point. 
This fpecies is very rare: 1 have only met with one perfe& {peci- 
men, which was found at, Caftleton, in the common, hard, ,grey 
limeftone. It is a complete change, evidently retaining the exter- 
nal fhape and markings of the original, which has been difplaced 
by limeftone, fimilar to that in which the foflil was lodged. The 
fame kind of ftone, alfo, and fpar blended together, conftitute 
the interior part of the f{pecimen, and fill up the aperture in the 
front of > toniageraive. 
EXPLANATION OF THE oe 
Tas. ut PERRY 
_/Gontaind 3 differen views of the Anomia deferibed a the gue 
Fig. Ie ~ full view of the mils. or Getted ae. 
Fig: Qe “Reprefents the 'fpecimen placed ina proper pofition for 
- fhewing ‘the binge, with the beak of the under valve*, and the flat 
perforated fide of the upper or conical valve; 
Fig. 3. An oppofite view, fhewing the back of the conical valve, 
with its deep. ;TOOVE or furrow, and the undulation of the margins. 
Fig, Ae A fide view of the fame fpecimen, 
Objervition It feems probable that this fhell, in a recent ftate, 
adhered by the flat perforated part of the larger valve to fome other 
body. I believe the few living Anomiz which are known, are al- 
{st ut Oi gat t 
* Tt is proper to remark, that ‘tind is called the iandée valve forms the upper part of 
fig. 25 3) 4. the pofition in which they are given appearing moft agreeable to the gene- _ 
zal make of the fhell. 
ways 
