REPORT ON THE RADIOLARIA. 77 



All pores regular, or subregular, hexagonal ; the outer twice as hroad as the inner. Outer Lars very 

 thin, thread-lilie ; inner bars thick, one-third as broad as the pores. Surface smooth. Both shells 

 connected by numerous radial beams, their distance one-third as large as the radius of the inner 

 shell. 



Dimensions. — Diameter of the outer shell 0'16, inner 012, distance of both 0'02 ; outer pores 

 0-014, inner pores 0-007. 



Habitat. — Central Pacific, Station 272, depth 2600 fathoms. 



2. Liosphcera rhodococcus, n. sjJ. 



Both shells with the same number of pores, exactly corresponding, about twelve on the quadrant. 

 All pores regular or subregular ; the inner circular, with elegant six-lobed frames, twice as broad as 

 the bars ; the outer hexagonal, with very thin thread-like bars. All corners of the outer and inner 

 hexagons connected by thin, bristle-shaped radial beams. (Similar to Haliomina rliodococcus, PI. 19, 

 fig. 6 ; but with smooth surface and regular hexagonal pores of the outer sheU.) 



Dimensions. — Diameter of the outer shell 0-2, inner O'lG, distance of both 0-02 ; outer pores 

 0-03, inner 0-01. 



Habitat. — Central Pacific, Station 266, depth 2750 fathoms. 



3. Liosphcera porulosa, n. sp. 



Both shells with regular hexagonal pores ; their number in the outer shell seven times as great 

 as in the inner. Pores of the stout inner shell large, three times as broad as the bars, about eight on 

 the quadrant. From each hexagon-corner arises one bristle-shaped radial beam ; their distal ends are 

 united by threads (three from each), forming the large meshes of the delicate outer shell. Each 

 of these is divided by very thin threads into seven small circular porules, one central and six 

 around it. 



Dimensio7is. — Diameter of the outer shell 0-25, inner 0-2, distance of both 0-025 ; outer 

 pores 0-04, their porules 0-012, inner pores 0-15. 



Habitat — Indian Ocean, Sunda Strait, Eabbe ; surface. 



Subgenus 2. Craspedomma, Haeckel. 

 Dejimtion. — Pores of both sliells irregular, in each shell differing either in form or size. 



4. Liosph<^ra 2^^^'idro'miiim, n. sp. 



Both shells with the same number of large, polygonal, very irregular pores, exactly correspond- 

 ing (about eight to ten on the quadrant) ; both with a very delicate thin framework. From the 

 thread-like bars of the inner, very large and thin-walled, sphere arise perpendicularly innumerable 

 short bristles of equal length, which are united at equal distances by tangential thread-like bars, 

 parallel to the former, composing the outer shell. Each mesh is, therefore, suiTounded by a delicate 

 ballister or rail. 



