REPORT ON THE RADIOLARIA. 1059 



2. Therospyris felis, n. sp. (PI. 89, fig. 6). 



Shell nut-shaped, mammillate, with sharp sagittal stricture. Pores large, irregularly roundish 

 or polygonal, of somewhat different size. Basal plate with four large pores. Surface covered with 

 hemispherical pointed mammillae. Four feet equal, divergent, half as long as the shell, at the distal 

 end forked, with few small branches. 



Dimensions. Shell 01 long, 015 broad; feet 0'05 long. 



Habitat. Central Pacific, Station 268, depth 2900 fathoms. 



3. Therospyris leo, n. sp. (PL 89, fig. 5). 



Shell nearly cubical, papillate, with slight sagittal stricture. Pores irregular, roundish; on each 

 side of the ring three pairs of larger pores (the undermost the largest). Basal plate with two large 

 pores. Surface covered with conical papillae. Four feet equal, divergent, about as long as the 

 shell, with an external spur in the middle, and irregularly branched spines at the distal end. 



Dimensions. Shell 0'08 long, 012 broad ; feet 0'09 long. 



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



Subfamily 7. POLYSPYRIDA, Haeckel, 1881, Prodromus, p. 442. 



Definition. Zy go spy rid a polypoda, with numerous descending basal feet (at 

 least seven to nine, usually twelve to sixteen or more). 



Genus 463. Petalospyris, 1 Ehrenberg, 1847, Monatsber. d. k. preuss. Akad. d. 



Wiss. Berlin, p. 54. 



Definition. Z ygospyrida with numerous (seven to twelve or more) basal feet 

 and one apical horn. 



The genus Petalospyris and the following three genera form together the peculiar 

 subfamily of Polyspyrida, differing from the other Zygospyrida in the multiplication of 

 the radial feet, which descend from the basal face of the shell ; they may therefore be 

 also called " Zygospyrida multiradiata," and bear the closest relationship to the Archi- 

 phaenida (or the " Monocyrtida multiradiata "). They differ, however, from the latter 

 in the presence of the distinct sagittal stricture, characteristic of all S p y r o i d e a. 

 The number of the basal feet, which form a coronet around the margin of the basal 

 plate, is commonly between twelve and sixteen, but often more. Their form is usually 

 flat, lamellar, but often also more or less cylindrical or conical. 



1 Petalospyris = Leaf-basket ; 



