28 N. Annandalp: : Notes on Freshwater Sponges. [Vol. II, 1908.] 



Measurements of skeleton spicules . . From 0*279 ^ 0*079 ^o 



0*231 X o*oi86 mm. 

 „ flesh spicules . . Length of shaft from 



0*159 to 0*046 mm. 

 Breadth of shaft==0'0026 



mm. 

 Diameter of rotule = 



o*oio6 mm. 

 0*026 to 0*039x0*0106 



mm. 

 0*38x0*29 to 0*55x0*25 



mm. 



gemmule spicules 

 aemmules 



