Plate 44. 



Fig. 1. Spongelia fragilis (Montagu), var. fasciculata. From a thick section 

 vertical to surface of sponge, showing four main fibers and con- 

 nectives. The conular terminations of the fibers appear in the 

 preparation, which has been macerated in caustic potash. X15. 



2. Hircima mutatis. From above. X 3 . 



3. PsammaplysiUa kelleri. From a transverse section (75 m thick, 



Delafield's haematoxylin ) . Showing branching fibers with coarse 



concentric stratification and the included, small, opaque masses of 



pigmented cells. X37. 

 4. Theonella cylindrica. From the side ; the gap indicates where a piece 



was removed from the specimen. X|. 

 5. Taprobane herd ma ni Dendy. Sponge, a complex of vases, seen from the 



side. X 3 

 514 



