211 Description of HemphilUa. 



Fig. 11. The same ; external view of animal contracted 

 in alcohol. 



Enlarged about one half. 



Fig. 12. Pellicula convexa Martens. 



Centrals and laterals ; copied from Heynemann, I. c, pi. iv, fig. 5. 

 Fig. 13. The same ; marginal tooth. 

 Fig. 14. The same ; jaw. 

 Fig. 15. He^yiphilUa glandulosa. 



Extreme marginal teeth. 

 Fig. 16. The same ; first marginal teeth. 

 Fig. 17. The same; central and lateral teeth. 



[Printed at the Salem Press. " 



