KEPORT ON THE RADIOLARIA. 821 



dimples, twenty larger parmal dimples (enclosing a radial spine and a couple of aspinal 

 pores) and fifty -two to fifty-four sutural dimples (sometimes one hundred or more), 

 each of which encloses one sutural pore. 



3. Ceriaspis inertnis, n. sp. (PI. 138, fig. 5). 



Shell spherical, with one hundred and seventy-six funnel-shaped dimples, one hundred and four of 

 which are blind and seventy-two perforated ; of the latter, each of the fifty-two smaller contains a 

 single sutural pore, each of the twenty larger a couple of aspinal pores. The elliptical or kidney- 

 shaped aspinal pores are about twice as broad as the circular sutural pores. Eadial spines thin, com- 

 pressed, two-edged ; their outer prolongation very short, rudimentary, scarcely higher than the axis 

 of the surrounding funnel, and projecting but slightly from its aperture. 



Dimensions. Diameter of the shell 0'15, of the forty parmal pores O'OIG, of the fifty-two 

 sutural pores O'OOS. 



Habitat. South Pacific, Station 289, surface. 



4. Ceriaspis favosa, n. sp. (PL 138, fig. 6). 



Shell polyhedral (icosahedral), with one hundred and eighty-two funnel-shaped dimples, one 

 hundred and eight of which are blind and seventy-four perforated ; of the latter, each of the fifty- 

 four smaller contains a single sutural pore, each of the twenty larger a couple of aspinal pores. All 

 pores roundish, nearly of the same size. Eadial spines thin, compressed, two-edged ; their outer part 

 somewhat longer than the inner. 



Dimensions. Diameter of the shell 012 to 0'13, of the pores O'Ol to 0'015. 



Habitat. Central Pacific, Station 274, surface. 



5. Ceriaspis icosahedra, n. sp. 



Shell polyhedral (icosahedral), with one hundred and eighty-two funnel-shaped dimples, one 

 hundred and eight of which are blind and seventy-four perforated ; of the latter, each of the fifty- 

 four smaller contains one small sutural pore, each of the twenty larger a couple of aspinal pores. The 

 kidney-shaped aspinal pores are very large, four to six times as broad as the small circular sutural pores. 

 Radial spines strong, quadrangular, their outer part from two to three times as long as the inner part. 



Dimensions. Diameter of the shell 0'16, of the parmal pores 0'015 to 0'02, of the sutural pores 

 0-003 to 0-004. 



Habitat. Tropical Atlantic, Station 349, surface. 



6. Ceriaspis cicatricosa, n. sp. 



Shell spherical, with two hundred and fifty to three hundred (or more) small funnel-shaped 

 dimples, the majority of which are blind, the minority perforated by pores ; of the latter forty 



