REPORT ON THE RADIOLARIA. 1607 



The regular or subregular triangular meshes of fhe lattice-sphere are separated in 

 Sagosphcera by solid, very thin threads, in the similar Aulosphcera, however, by thicker 

 hollow tubes. The genus Sagosphcera may be divided into two subgenera : 

 Sagosphcerella with a single radial spine at each nodal point of the network, and 

 Sagosphceroma with a bunch of two to four or more divergent radial spines. 



1. Sagosphcera trigonilla, n. sp. 



Badial spines simple, straight, smooth, about as long as the smooth bars of the network, a 

 single one at each nodal point. Meshes very regular, of equal size, equilateral triangular. 

 (Similar to the common Aulosphcera trigonopa.) 



Dimensions. Diameter of the sphere T2 to l - 8, length of the bars 01 to 0'2, breadth - 002 

 to 0-006. 



Habitat. Cosmopolitan ; Mediterranean, Atlantic, Pacific, surface. 



2. Sagosphcsra penicilla, n. sp. (PI. 108, fig. 10). 



Eadial spines straight, stout, a single one at each nodal point, twice as thick, but of the same 

 length as the smooth bars of the network, armed at the distal end with a brush of numerous thin 

 radial bristles. (Very similar to Sagenoscena pencillata, but without pyramidal elevations on the 

 surface of the sphere.) 



Dimensions. Diameter of the sphere I'O to 1'5, length of the bars 01 to 015, breadth - 002 to 

 0'004. 



Habitat. Antarctic Ocean, Station 154, surface. 



3. Sagosphcera verticilla, n. sp. 



Eadial spines slender, slightly curved, a single one at each nodal point, armed with three to five 

 cruciate verticils, each of which is composed of four crossed lateral branches with spinulate terminal 

 knobs (similar to Sagmidium crucicorne, PL 108, fig. 9), but with a spherical shell, having a simply 

 latticed, and not a spongy wall. 



Dimensions. Diameter of the sphere 2'0 to 2'5, length of the bars 01 to 0'2, breadth 0'002. 



Habitat. North Pacific, Station 256, surface. 



4. Sagosphcera furcilla, n. sp. (PI. 108, figs. 11, lla). 



Eadial spines short, spinulate, with a spiny terminal knob (fig. lla), two or three arising from 

 each nodal point of the network in divergent directions, only one-third or one-fourth as long as 

 its smooth bars. Meshes more or less irregular, triangular. 



Dimensions. Diameter of the sphere 2 - 2, length of the bars - 2 to 0'3, breadth 0'004. 



Habitat. South Pacific, Station 293, depth 2025 fathoms. 



