REPORT ON THE RADIOLARIA. 63 



7. Cenosphcera bombus, n. sp. 



Shell thick walled, rough. Pores regular, circular, with thin hexagonal frames, of the same 

 breadth as the bars, twenty to twenty-two on the quadrant. 



Dimensions. Diameter of the shell 0'3, pores and bars 0'005. 

 Habitat. Tropical Atlantic, Station 347, depth 2250 fathoms. 



8. Cenosphcera melecta, n. sp. 



Shell thick walled, papillate. Pores regular, circular, double-edged, with thick hexagonal 

 frames, of the same breadth as the bars ; a short conical papilla in the corner of each hexagon ; 

 fourteen to sixteen pores on the quadrant. 



Dimensions. Diameter of the shell 0'2, pores and bars O'OOS. 



Habitat. Fossil in Barbados. 



9. Cenosphcera anthophora, n. sp. 



Shell thick walled, papillate. Pores regular, circular, with an elegant six-lobed frame and a 

 coronal of six short papillse ; the latter alternating with the six lobes (quite as in PL 28, fig. Ib). 

 Pores twice as broad as the bars, ten to twelve on the quadrant. 



Dimensions. Diameter of the shell 0'13, pores O'Ol, bars 0'005. 



Habitat. Central Pacific, Station 271, surface. 



10. Cenosphcera rosetta, n. sp. 



Shell thin walled, smooth. Pores regular, circular, with an elegant six-lobed outer opening, 

 without papillae. Pores of the same breadth as the bars, six to eight on the quadrant. 

 Dimensions. Diameter of the shell O'l, pores and bars O'OOG. 

 Habitat. South Atlantic, Station 323, depth 1900 fathoms. 



Subgenus 2. Circosphcera, Haeckel. 



Definition. Pores of the spherical shell regular or subregular, circular, without 

 hexagonal frames or lobes, all nearly of equal size and form. 



1 1 . Cenosphcera porophcena, Ehrenberg. 



Cenospliaera porophcena, Ehrenberg, 1858, Monatslaer. d. k. preuss. Akad. d. Wiss. Berlin, p. 31. 



Shell thin walled, smooth. Pores regular, circular, six to eight times as broad as the bars, five to 

 six on the quadrant. 



Dimensions. Diameter of the shell O'l, pores 0'012, bars 0'002. 

 Habitat. Mediterranean (Crete, depth 1100 fathoms; Corfu, surface). 



