PLATE 104. 



Page 



Fig. 1-4. Renssel.«;ria ovoides. 456 



1 a. The dorsal side of a young specimen, where the length little exceeds the width ; the 

 shell nearly all exfoliated. 



1 b, c. Ventral and profile view of the cast of a larger individual, preserving a little of the 

 shell. 



1 d. Cardinal view of a cast of a specimen of medium size, which is more ventricose than \h c. 



2 o, b. Dorsal and profile view of a large specimen of elliptical form, preserving a part of the 



shell in front. 



3 a. Cardinal view of a large cast, the ventral valve uppermost. 



3 6. Dorsal view of an individual of ovate form, preserving the greater part of the shell. 

 3 c. Cardinal view of a gibbous specimen. 



3 d. Cardinal view of an extremely gibbous specimen, which is flat or slightly concave at the 



sides, and the centre of the ventral valve strongly elevated. 

 4. A fragment of stone presenting the aspect of these fossils in their usual condition in the 



rock. 



