REPORT ON THE RADIOLARIA. 1061 



long as the shell (its edge is described by Ehrenberg as a " canaliculus.") Feet ten to twelve, flat, 

 triangular, vertical, about as long as the shell 



Dimensions. Shell 0-04 long, 0'05 broad ; horn 0'07 long, feet 0'03 long. 



Habitat. Fossil in Barbados. 



5. Petalospyris corona, Stohr. 



Petalospyris corona, Stohr, 1880, Palseontogr., vol. xxvi. p. 98, Taf. iii. fig. 13. 



Shell nut-shaped, smooth, with slight sagittal stricture and very numerous small circular pores ; 

 on each side of the stricture three larger annular pores (the undermost the largest). Basal plate 

 with three large pores only. Apical horn very small, conical. Feet twelve to eighteen, short 

 conical, nearly vertical, shorter than the half shell (in my specimen from Caltanisetta much stouter 

 than in that of Stohr). 



Dimensions. Shell 0'07 long, 0'09 broad ; horn and feet O'Ol to 0'03 long. 



Habitat. Fossil in Tertiary rocks of Sicily (Grotte, Caltanisetta). 



Subgenus 3. Petalospyrissa, Haeckel. 



Definition. Basal plate with four collar pores (two larger posterior cardinal and 

 two smaller anterior jugular pores). 



6. Petalospyris octopus, n. sp. (PI. 87, fig 11). 



Shell nut-shaped, tuberculate, with sharp sagittal stricture and irregular, roundish pores. Basal 

 plate with four larger pores. Horn slender, conical, half as long as the shell. Feet eight, very 

 slender, about three times as long as the shell, subvertical, with outer convex edge and convergent 

 ends. 



Dimensions. Shell 0'06 long, 0'09 broad ; horn O03 long, feet 02 long. 



Habitat. Tropical Atlantic, Station 342, depth 1445 fathoms. 



7. Petalospyris eupetala, Ehrenberg. 



Petalospyris eupetala, Ehrenberg, 1875, Abhandl. d. k. Akad. d. Wiss. Berlin, p. 80, Taf. xxii. 



fig. 4. 



Shell nut-shaped, tuberculate, with slight sagittal stricture and scattered small circular pores. 

 Basal plate with four large collar pores (sometimes surrounded by several small peripheral pores). 

 Apical horn slender, conical, as long as the shell. Feet sixteen to twenty, laminated and truncate, 

 of the same length, nearly vertical and parallel. 



Dimensions. Shell 0'06 long, - 08 broad; horn and feet O05 to 0'07 long. 



Habitat. Fossil in Barbados. 



