REPORT ON THE RADIOLARIA. 1043 



of teeth. The connected feet form a heart-shaped ring, four times as long and three times as 

 broad as the shell. Each foot bears on the outer convex edge four to six stout conical teeth, 

 shorter than the shell. Distal ends crossed and prominent. 



Dimensions. — Shell diameter 01 ; length of the arm-ring 0'4, breadth OS. 



Habitat. — Central Pacific, Station 265, depth 2900 fathoms. 



2. Stephano&pyris verticillata, n. sp. (PI. 85, fig. 11). 



Shell nut-shaped, tuberculate, with subregular circular pores. Basal plate with numerous 

 small pores. Apical horn cylindrical, four to six times as long as the shell, with six to ten 

 verticils of teeth. The connected feet form a circular ring, the diameter of which is four times 

 as great as that of the shell. Each foot bears ten to twelve conical teeth, about as long as the 

 shell. Distal ends not crossed and not prominent. 



Dimensions. — Diameter of the shell 01, of the arm-ring 0-4. 



Haiitat. — Central Pacific, Station 266, depth 2750 fathoms. 



3. Stephanosinjris excellens, n. sp. (PI. 83, fig. 20). 



Shell subspherical, tuberculate, with regular circular pores. Basal plate with numerous small 

 pores. Apical horn cylindrical, twice as long as the shell, with eight verticils of teeth. The 

 connected feet form an ovate ring, which is three times as long and two and a half times 

 as broad as the shell. Each foot bears eight conical spinulate teeth, about as long as the shell. 

 The crossed and prominent distal ends bear two parallel vertical teeth. 



Dimensions. — Diameter of the shell 01, of the arm-ring 0-2 to O'S. 



Babital— Central Pacific, Station 268, depth 2900 fathoms. 



Subfamily 3. Tetraspyrida, Haeckel, 1881, Prodromus, p. 442. 



Definition. — Z ygospyrida tetrapoda, with four descending basal feet, two of which 

 are opposite in the sagittal plane (an odd caudal and an odd sternal foot), whilst the two 

 others are paired lateral or pectoral feet. 



Genus 451. Tetraspyris^ Haeckel, 1881, Prodromus, p. 442. 



Definition. — Zygospyrida with four basal feet crossed in pairs (two sagittal and 

 two lateral). Apex with a horn. 



The o-eniis Tetraspyris and the following closely allied Tessarospyris represent 

 together the small subfamily of Tetraspyrida, characterised by the possession of four 

 descending basal feet, three of which correspond to the three original feet of the 



1 reirtwpi/m = Basket Tvith four feet ; Ttrja, uttv^i;. 



