PLATE 129. 



ASTROLOPHIDA, LlTHOLOPHIDA, CHTASTOLIDA et ASTEOLONCHIDA. 



Diam, Page 

 Fig. 1. Actinelius primordialis, n. sp., . . . x 100 730 



The red central capsule, coloured by carmine, contains numerous intensely 

 stained nuclei. 



Fig. 2. Litholophus decapristis, n. sp., . . . x 300 735 



The conical central capsule contains numerous nuclei. The calymma ex- 

 hibits on the distal end of each spine a coronet of myophriscs. 



Fig. 3. Chiastolus amphicopium, n. sp., . . . x 150 738 



Sixteen diametral spines pierce the spherical, red-coloured central capsule. 



The conical sheets of the calymma bear myophriscs. 

 Figs. 3a, 3b. Tavo isolated diametral spines exhibiting the peculiar spiral 



revolution at their central part, . . . X 300 



Fig. 4. Xiphacantha ciliata, n. sp., . . . . x 300 761 



The spherical central capsule is coloured red. The yellowish calymma 

 envelops the radial spines completely. The polygonal network of 

 lines, in which the radiating pseudopodia are symmetrically arranged, 

 is partly visible. 



Fig. 5. Xiphacantha ciliata, n. sp.,. . . . . x 300 761 



The central part of the skeleton, exhibiting the central junction of the 

 radial spines. 



Tig. 6. Acanthometron dolichoscion, n. sp., . . . x 300 743 



Central capsule of a young specimen ; in its upper half the peculiar kidney- 

 shaped nucleus is visible, with its invagination; in the lower half 

 some nucleated yellow cells are visible (intracapsular xanthellse). 

 These and the nucleus are stained by carmine. 



Fig. 7. Acanthometron dolichoscion, n. sp., . . . x 300 743 



Cleavage of an isolated nucleus, with four buds. 



Fig. 8. Acanthometron dolichoscion, n. sp., . . . . x 300 743 



A central capsule with four large budding nuclei; and numerous small 

 spherical nuclei produced by gemmation. 



Fig. 9. Acanthoma tetracopa, n. sp., . . . . x 400 749 



Central capsule of a young specimen, with a large, irregularly lobate 

 nucleus. 



Fig. 10. Acanthoma tetracopa, n. sp., . . . . x 400 749 



An isolated nucleus, exhibiting the peculiar invagination, with its circular 

 folds, and the connection with the flatly conical nucleolus. 



Fig. 11. Acanthoma tetracopa, n. sp., . . . . x 800 749 



Four flagellate spores. 



