466 JENKINS— GEOLOGY OF THE [May 29, 



Explanation of Plate XX. 



Fig. I. Corbula (?) sp. ind. Drawing from a wax mold. 



Fig. 2. Cardium soaresanum Rathbun. Composite drawing from sev- 

 eral wax molds. 



Fig. 2a. Cardium soaresanum Rathbun. Showing inside cast of shell. 



Fig. 3. Osirea (?). Drawing of an impression of the shell. 



Fig. 4. Cerit Ilium (?) sp. ind. Drawing from a wax mold. 



Fig. 5. Cerithium (?). Drawing from a wax mold. 



Fig. 6. Turritella natalensis n. sp. Composite drawing from several 

 wax molds. 



Fig. 6a. Turritella natalensis n. sp. Showing inside cast of shell. 



Fig. 7. Turritella ( ?) jacoquea n. sp. Composite drawing from several 

 wax molds. 



Fig. ya. Turritella (?) jacoquea n. sp. Showing inside cast of shell. 



Fig. 8. Cerithium (?) mirimense n. sp. Composite drawing from sev- 

 eral wax molds. 



Fig. 8a. Cerithium (?) mirimense n. sp. Showing inside cast of shell. 



Fig. 9. Natica (?). Outline of the impression of the shell. 



