244 



PLATE EXPLANATION. 



Fig. 1. Fiisulina .secalica 



la. A specimen showing the septal furrows and the cen- 

 trifugal aperture. 



1 b. Some weathered specimens. 



Fig. 2. Camphopliylum torquum 



2 a. Longitudinal view of a portion of a coral. 

 2 b. Cross section. 



2 c. A longitudinal section showing tabuliP. 



Some crinoid plates 



Fenestella ? 



? Rhombopera ? - 



Hemeitrypa ? 



Archfeocidaris spines 



Pugnax iita 



Sa. Ventral valve. 



8 1). Dorsal valve. 



Fig. 9. Amboc;plia planoconvexa 



9 a. Dorsal view. 

 9 b. Venrral view. 



9 c. Side view. 



Fig. lU. Reticularia peri)lexa 



10 a. Ventral valve. 

 10 b. Dorsal valve. 



Fig. 11. Dielasma bovidines, dorsal view 



Fig. 12. Seminula argentia 



12 a. Ventral valve showing sinus. 



12 b, f and g. Dorsal views. 



12 c. Dorsal view of a young specimen. 



12 e. Side view. 



12 m. An old specimen. 



Fig. 13. Myalina ? Outline only 



Fig. 14 a, b, c, e. Fragments of an Euomphalus pernodosus 



Fig. 15. Productus punctatus 



15 a. A portion of tlie dorsal valve. 



15 b. Inside of dorsal valve, showing muscular impres- 

 sions. 



