34< 



GEPHYRIA. 



Fig. 97. Entopyla incurvata. 



The genus Entopyla includes eight species, either fossil or inhabiting 

 tropical regions. E. Australis Ehr. is represented in figure 96, reproduced 

 from figures by an esteemed correspondent Mr. C. Janisch (zur Charakteristik 

 des Guanos), and shows on the right the girdle face, and underneath the 

 convex valve, the two other valves showing coarse terminal nodules are 

 concave valves. E. incurvata (Arn.) Grun., often met with in collections 

 under the name of Gephyria incurvata, is represented in figure 97. 



GENUS 60. GEPHYRIA W. ARNOTT, i860. 



Differs from Entopyla by the absence of false septa. The two 

 genera are closely allied, and might, with some reason, be united into 

 a single genus. 



Six species of Gephyria have been described, but they are all found out- 

 side the confines of Europe, either living or fossil. 



