Plate m. 



Page 

 Fig. I. HalJchondria coiossea n. sp., seen from above, '/j 27 



2. Haliclwndria coiossea n. sp., side view. V, 



3 



— 3, 4, 5, 6, 7. Halichondria osctilum 11. sp., individuals of different forms. osculum, 



a groove with osculum. '/i 23 



