PLATE 6. 



COLLOSPH^ERIDA. 



Diam. Page 

 Fig. 1 . Sipkonosphcera socialis, n. sp., . . . . . . x 500 106 



A small piece of the surface of a living coenobiuiu, seen from the surface. Only four 

 individuals are visible, the central capsule of which contains numerous small nuclei 

 and a central oil-globule. The including spherical lattice-shell is provided with a few 

 (one to four) larger apertures, which are prolonged into short cylindrical tubules. 

 Through these latter radiate bundles of fine pseudopodia, branching and anastomosing, 

 and forming a fine sarcode network between the alveoles of the calymma. On the surface 

 of the alveolated jelly-sphere the pseudopodia form a dense radiating zone. Xanthella 

 or yellow cells are everywhere scattered. 



Fig. 2. Siphonosphccra socialis, u. sp., . . . . . . . x 300 106 



A small coenobium or colony in the state of alveolation, forming a jelly-sphere, composed of 

 a great number of capsulated individuals, densely aggregated. Each central capsule 

 contains an oil-globule, and is enclosed by a spherical lattice-shell, which bears a few 

 (one to four) short cylindrical tubules. Each shell is again enveloped by a membranous 

 polyhedral alveole and separated from it by structureless jelly. The thick cortical 

 jelly-envelope, which surrounds the whole spherical colony, exhibits a fine radial striation, 

 produced by radiating pseudopodia ; many xanthellre or yellow cells are scattered in the 

 calymma. 



Fig. 3. Siphonosplurra pipctta, n. sp., . . . . . . x 300 108 



Fig. 4. Siphonosphccra tubulosa, J. Miiller, . . . . . . x 300 105 



The central capsule, enclosed in the cavity of the shell, has a central oil-globule, and is 

 surrounded by a few xanthella. 



Fig. 5. Siphonospha'ra chonophora, n. sp., . . . . . x 300 107 



Central capsule as in figs. 4 and 7. 



Fig. G. Siphonosphccra serpvla, u. sp., 



Fig. 7. Siplionosphcura patinaria, n. sp., 



The central capsule, enclosed in the cavity 

 is surrounded by a few xanthella. 



Fig. 8. Siphonosphccra patinaria, n. sp., 

 Fig. 9. Siphonosphccra conifcra, n. sp., 

 Fig. 10. Si r phonosphcera cyathina, n. sp., 



of the shell, contains a central oil-globule, and 



x 300 107 



x 300 105 



x 300 105 



x 300 106 



x 300 105 



