PLATE 4. 

 SPH^EOZOIDA. 



Diam. Page 

 Fig. 1. Sphcerozoum trigeminum, n. sp., . . . . x 50 43 



An annular colony. The main mass of the jelly-colony is tilled up by large 

 alveoles ; the entire surface is densely covered with spicula, and beyond 

 this skeleton-cover lie the spherical central capsules, each with an oil- 

 globule. This species is by mistake not mentioned in the text. 



Fig. 2. Sphcerozoum alveolatum, n. sp., . . . . x 50 43 



Section through a spherical colony; displaying the inside of a hemisphere. 

 All the central capsules lie in a single stratum on the surface of the 

 jelly-sphere, each being surrounded by a thick-walled alveole. The 

 spicula lie between the alveole and the capsule, which includes a 

 central oil-globule. 



Fig. 3. Sphcerozoum alveolatum, n. sp.,. . . . x 400 43 



A single central capsule, filled up by crystal-spores. Numerous geminato- 

 radiate spicula and spherical xanthellse lie between the. capsule and the 

 including thick-walled alveole. In the jelly -calymma, between the cap- 

 sule and the alveole, numerous thin ramified pseudopodia are expanded. 



Fig. 4. Sphcerozoum geminatum, n. sp., . . . x 400 45 



A single central capsule, with a central oil-globule, surrounded by numerous 

 spicula and spherical xanthellae. The jelly-substance of the calymma 

 is expanded between the points of the spicula. 



Fig. 5. Sphcerozoum variabile, n. sp., . . . . x 300 45 



Three isolated spicula. 



Fig. 6. Sphcerozoum pandora, n. sp. (vel Rhaphidozoum pandora], . x 300 49 

 A group of various spicula. 



Fig. 7. Sphcerozoum verticillatum, n. sp., . . . . x 300 44 



A single spiculum. 



Fig. 8. Sphcerozoum arborescens, n. sp., . . . x 300 44 



A single spiculum. 



Fig. 9. Sphcerozoum armatiim, n. sp., . . . . . x 300 43 



A single spiculum. 



