REPORT ON THE RADIOLARIA. 609 



circular pores three times as broad as the bars ; about eleven pores on the half meridian, nine on the 

 half equator. Proportion of the three dimensive axes = 3 : 4 : 5. 



Dimensions, Length of the shell 01, breadth O08, thickness 0'06, pores 0-006 ; bars 0'002. 



Habitat. North Pacific, Station 244, surface. 



4. Larcarium axffstylum, n. sp. 



Shell thorny, with six strong conical radial spines, opposite in pairs on the poles of the three 

 dimensive axes. All three pairs are of different sizes, the length of each spine corresponding nearly 

 to the size of the shell-axis, of which it is the prolongation. Network of the shell subregular, with 

 circular pores twice as broad as the bars ; ten on the half meridian, eight on the half equator. 

 Proportion of the three dimensive axes = 2:3:4. 



Dimensions. Length of the shell 012, breadth 0'09, thickness 0'06 ; pores O'Ol, bars 0'005. 



Habitat. Western Tropical Pacific, Station 225, depth 4475 fathoms. 



5. Larcarium octostylum, n. sp. 



Shell thorny, with eight thin cylindrical radial spines, opposite in pairs in two crossed diagonal 

 planes. Network of the shell irregular, with, roundish pores, twice to four times as broad as the 

 bars; nine to eleven on the half meridian, five to seven on the half equator. Proportion of the three 

 dimensive axes = 3:4:5. 



Dimensions. Length of the shell Oil, breadth 0'09, thickness 0'07 ; pores O'OOG to 0'012, 

 bars 0-003. 



Habitat. Pacific, central area, Station 267, surface. 



6. Larcarium polystylum, n. sp. 



Shell thorny, with numerous (twenty to thirty) stronger conical radial spines, about as long as 

 the shortest axis of the shell. Network of the shell irregular, with roundish pores, twice to four 

 times as broad as the bars ; seven to eight on the half meridian, five to six on the half equator. 

 Proportion of the three dimensive axes = 1:2:3. 



Dimensions. Length of the shell 0'09, breadth 0'06, thickness 0'03 ; pores 0'006 to 0'012, 

 bars 0-003. 



Habitat. South Atlantic, Station 323, surface. 



7. Larcarium chcetostylum, n. sp. 



Shell bristly, with very numerous (sixty to eighty or more) very thin, bristle-like, radial spines, 

 somewhat longer than the longest axis of the shell. Network irregular, with very small roundish 

 pores, about the same size as the bars ; sixteen to eighteen on the half meridian, thirteen to fifteen 

 on the half equator. Proportion of the three dimensive axes = 1 : 1 -5 : 2. 



(ZOOL. CHALL. EXP. PART XL. 1885.) R r 77 



