REPORT ON THE RADIOLARIA. 65 



18. Cenosphcera nirwana, n. sp. 



Shell thick walled, smooth. Pores regular, circular, twice as broad as the bars, twenty-four to 

 twenty-five on the quadrant. 



Dimensions. Diameter of the shell 0'25, pores O004, bars 0'002. 

 Habitat. Indian Ocean, Belligemma, Ceylon, surface ; Haeckel. 



19. Cenosphcera maxima, n. sp. 



Shell thick walled, smooth. Pores regular, circular, twice as broad as the bars, thirty to thirty- 

 three on the quadrant. 



Dimensions. Diameter of the shell 0'3 to 0'4, pores 0'012, bars O'OOG. 



Habitat. West Tropical Pacific, Station 225, depth 4475 ; also fossil in Barbados. 



20. Cenosphcera compacta, n. sp. (PI. 12, fig. 7). 



Shell very thick walled, rough (its wall one-fourth to one-third as thick as the radius). Pores 

 subregular, circular, of the same breadth as the bars, seven to eight on the quadrant. 

 Dimensions. Diameter of the shell O15, pores and bars 0'012. 

 Habitat. Central Pacific, Station 265, depth 2900 fathoms. 



21. Cenosphcera crassa, n. sp. 



Shell very thick walled, rough (its wall nearly half as thick as the radius). Pores tubular, 

 double-edged, regular, circular, ten times as broad as the thin united bars, twelve to fourteen on the 

 quadrant. 



Dimensions. Diameter of the shell 014, pores O'Ol, bars O'OOl. 



Habitat. Central Pacific, Station 268, depth 2900 fathoms. 



22. Cenosphcera solida, n. sp. 



Shell very thick walled, covered with innumerable short bristles (its wall one-third as thick as 

 the radius). Pores regular, circular, four times as broad as the bars, tubular, eight to ten on the 

 quadrant. 



Dimensions. Diameter of the shell 0'2, pores - 02, bars - 005. 



Habitat. Antarctic Ocean, Station 157, depth 1950 fathoms. 



Subgenus 3. Cyrtidosphcera, Haeckel, 1862, Monogr. d. Radiol., p. 348. 



Definition. Pores of the spherical shell irregularly polygonal, of unequal size or 

 form, sometimes roundish with polygonal frames. 



(ZOOL. CHALL. EXP. PART XL. 1885.) Rr 9 



