I 12 



N. ANN ANDAI.!. 



Explanation of Plate II. 



Figs. I, la, lb. Spongilla fragilis from Tokyo 



Fig'. I. Skeleton spicules. 



Fig. I a. Young gemmule spicules. 



Fig. I b. Fully formed gemmule spicules. All x 240. 

 Figs. 2, 2 a, 2 b, 2 c. Ephydatia semispongilla, sp. nov. 



Fig. 2. Fragment of skeleton, x 70. 



Fig. 2 a. Gemmule from above, x 70. 



Fig. 2 b. Skeleton spicules, x 240. 



Fig. 2 c. Birotulates, x 240. 

 Fig- 3, 3 a. 3 b. Ephydatia japonica. 



Fig- 3- Gemmule, x 70. 



Fig- 3 a. Skeleton spicules, x 240. 



Fig. 3 b. Birotulates, x 240. 



