1894.] 



MICEOSCOPICAL JOURNAL. 



117 



Two horns. or a bunch. 

 No horn. 



Abdomen ovate or inversely conical. 



Mouth more or less constricted. 

 One horn. 

 Two or a bunch. 

 No horn. 



MOUTH CLOSED. 



Horn. 

 No horn. 



Lophocyrtis. 

 Tricolocampe. 



Theocorys. 

 Lophocorys. 

 Theocafnpe. 



Theocapsa. 

 Tricolocapsa. 



SECTION D. FOUR TO SEVEN OR MORE JOINTS IN 



SHELL. 



36.— Family: PODOCAMPIDA. Three radial apophy- 



ses. 



MOUTH OPEN. 



Stichopilium. 

 Pteropilium. 

 MOUTH CLOSED. 

 Three solid ribs. Cephalis with apical horn. Artopera. 



Wings solid. 

 Winofs latticed. 



37.— Family : PH0RM0CA3IPIDA. Numerous radial 

 apophyses, 



