I^L^TE XIII. 



rij; 1. ^NOCERAMUS ERECTCS , 145 



1. A side view of an intorual cast of both valves, somewhat distorted. 



1 a. Another small cast of a left valve. 



Fig. 2. iNOCEKAiMUS PROBLKMATIOUS ? 143 



2 a. Cast of a light valve. 



2 6. A part of an internal cast of a form with a more pointed beak (partly due to distor- 

 tion), possibly belonging to another species. 



rig. 3. Inoceramus Simpsoni. An internal cast of a right valve, with some remaining portions 

 of the shell. Portions of the basal and posterior dorsal margins being broken 

 away 142 



Fig. 4. Inoceramus (nndt. sp.), side view „ 144 



4<t. A profile outline of same. 



