REPORT ON THE RADIOLARIA. 81 



8. Thecosphcera entactinia, n. sp. 



Cortical shell thick walled, smooth, with regular circular pores of the same breadth as the bars. 

 Eadial proportion of the three spheres = 1 :3 : 12 ; they are connected by very numerous (forty to 

 fifty, or more) thin radial beams. 



Dimensions. Diameter of the outer shell 0'24, middle 0'06, inner 0'02 ; cortical pores and 

 bars 0-008. 



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



9. Thecosphcera micropora, n. sp. 



Cortical shell thin walled, smooth, with very small and numerous, regular, circular pores, half as 

 broad as the bars. Eadial proportion of the three shells = 1:2:5; they are connected by twenty 

 regularly disposed radial beams. 



Dimensions. Diameter of the outer shell 0'2,middle 0'08,inner 0'04; cortical pores 0'002,bars 0'004. 



Habitat. South Pacific, Station 288, surface. 



Subgenus 3. Thecosphcerina, Haeckel. 



Definition. Pores of the cortical shell irregular polygonal, of unequal size or dis- 

 similar form. 







10. Thecosphcera capillacea, n. sp. 



Cortical shell thin walled, smooth, with irregular polygonal pores, three to six times as broad 

 as the bars. Both medullary shells with similar, but smaller, pores. Eadial proportion of the 

 three spheres = 1:3:8; they are connected by very numerous (sixty to eighty or more) thin 

 radial beams. (Similar to Actinomma capillaceum, PI. 29, fig. 6, but without external spines.) 



Dimensions. Diameter of the outer shell - 2, middle- 0'075, inner 0'025 ; cortical pores 0'006 

 to 0-012, bars 0'002. 



Habitat. North Pacific, Station 250, surface. 



11. Thecosphcera diplococcus, n. sp. 



Cortical shell thick walled, rough, with large irregular polygonal pores, two to three times as 

 broad as the bars. Both medullary shells with small regular circular pores. Eadial proportion 

 of the three spheres = 1:2:6; they are connected by twenty (?) stout radial beams. 



Dimensions. Diameter of the outer shell 0'12, middle 0'04, inner 0'02 ; cortical pores O'OOS 

 to 0-012, bars 0'004. 



Habitat. South Atlantic, Station 330, surface. 



Subgenus 4. Thecosphceromma, Haeckel. 



Definition. Pores of the cortical shell irregular, roundish, of unequal size or dissimilar 

 form. 



(ZOOL. CHALL. EXP. PAET XL. 1885.) Rl 11 



