PLATE 6. 



COLLOSPH^ERIDA. 



Diam. Page 

 Fig. 1. Siphonosphcera socialis, n. sp., . . x 509 106 



A small piece of the surface of a living ccenobium, 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 calyinma. On the surface 

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

 or yellow cells are everywhere scattered. 



Fig. 2. Siphonosphcera socialis, n. 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 psendopodia ; many xanthella! or yellow cells are scattered in the 

 calymma. 



Fig. 3. Siphonosphcera pipetta, n. sp., ... x 300 108 



Fig. 4. Siphonosphcera tubulosa, J. Muller, . . 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. Siphonosphcera chonophora, n. sp., ... x 300 107 



Central capsule as in figs. 4 and 7. 



Fig. 0. Siphonosphcera serpula, n. sp., .... x 300 107 



Fig. 7. SipJwnosjjhccra patinaria, n. sp., .... x 300 105 



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

 is surrounded by a few xanthella. 



Fig. 8. Siphonosphcera patinaria, D. sp., ... x 300 105 



Fig. 9. Siphonosphcera conifera, n. sp., . . x 300 106 



Fig. 10. Siphonosphcera cyathina, n. sp., x 300 105 



