PLATE VIT. 



Fig. 



1. Gonioseris anguluta, Duncan. (Page 21.) 



2. Under side — the base. 



3. Side view. 



4. Costae. 



5. Synapticulae. 



(5. Gonioseris Leckenhi/i, Duncan. (Page 22.) 



7. Base. 



8. Side view. 



9. Costas at tlie angle of the base. 



> Small specimen of young Gonioseris. 

 12.1 



,. j- Symphyllian form of a 27/(?cosw27zo». (Page 9.) 

 I5J 



