Plate XXXVIII; Figures 245 to 2= 1 t i ; Magnified iooo 



Diameters. 



Cosmarium ovale Raits . 



pyramidatum Breb. 

 Meneghinii Breb. 

 octhodes Nord. 



perforatum Lund. 

 Ndgelianum Breb. 

 intermedium Delp. 

 Port'itium Arch. 

 orbiculatum Ralfs 



page 64 



