216 DE. G. J. HINDE ON RADIOLAKIA IN CHERT [May 1 89 9, 



Genus Stigmosphj3eost"slus, Riist. 



The test is a simple latticed sphere, with radial rods in the 

 interior and two opposite radial spines. 



Stigmosph^eostylus in^qtjalis, sp. nov. (PI. XVI, fig. 3.) 



The pores of the mesh are circular or oval, and very unequal in 

 size ; only the bases of the radial spines are preserved. The 

 internal radii are apparently six in number ; they are now displaced 

 in the specimen. Diameter of test, 0*125 mm. ; width of pores, 

 0-006 to 0-02 mm. Rare. 



Order PRTJNOIDEA, Haeckel. 

 Genus Cenellipsis, Haeckel. 

 The test is a simple latticed ellipse, without radial spines. 



€enellipsis setosa, sp. nov. (PI. XVI, fig. 7.) 



Test a regular oval, with minute subequal rounded pores and 

 small surface-spines. The width of the mesh is somewhat less than 

 that of the pores. There is considerable difference in the size of 

 the forms referable to this species. A large specimen measures 

 0'27 mm. by 0*21 mm., and the pores are 0*01 mm. in width ; 

 an average example, such as that figured, is 0-185 by 0*15 mm. in 

 length and breadth, and the pores are about 0-007 mm. wide, 



Oenellipsis favosa, sp. nov. (PI. XVI, fig. 8.) 



Test oval, surface without spines, the pores rounded or oval, very 

 unequal in size, the smaller interspersed among the larger. 

 Length, 0-195 mm. ; breadth, 0-15 mm. ; pores, from 0-015 to 0*025 

 mm. in width. The form fromMullion Island, referred to as sp. a^ 

 but not named, is probably identical with this species. 



Cenellipsis scitula, sp. nov. (PL XVI, fig. 6.) 



The pores of the test are circular or oval, unequal in size ; the 

 surface is furnished with small spines. Length, 0-16 mm. ; breadth, 

 0-12 mm, ; pores, 0-006 to 0-02 mm. in width. The smaller dimen- 

 sions of the pores and the surface-spines distinguish this from the 

 preceding species. 



Genus Staueodeuppa, Hinde. 



The test consists of two concentric elliptical latticed shells, with 

 four radial spines disposed crosswise in two axes, but not always 

 at right angles. 



Staueodeuppa nucula, Hinde. (PI. XVI, figs. 9 & 10).^ 



Both the cortical and medullary tests are regularly oval ; the pores 

 are very small, rounded or occasionally subangular, and apparently 

 of the same size in the inner as in the outer test ; in some examples 

 they are arranged in oblique rows. The spines are stout and 



1 Quart. Journ. Geol. Soc. vol. xlix (1893) p. 217 & pi. iv, fig. 4. 



2 Ibid. vol. U (1899) p. 52 & pi. ix, fig. 7. 



