PLATE 104. 
Page 
Fig. 1-4. Rensselasria 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 16 c. 
2 a, 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 b. 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. 
