REPORT ON THE RADIOLARIA. 1607 



The regular or subregular triaugular meshes of the lattice-sphere are separated in 

 Sagosplicera by solid, very thin threads, in the similar Aulosiohcera, however, by thicker 

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

 Sagosph(Brella with a single radial spine at each nodal point of the network, and 

 SagosphcBroma with a l)unch of two to four or more divergent radial spines. 



1. Sagosphmra trigonilla, n. sp. 



Eadial 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 Aulosplictra trigonojM.) 



jDimenslons. — Diameter of the sphere 12 to 1'8, length of the bars O'l to 0'2, breadth 0"002 

 to 0-006. 



Habitat. — CosmopoUtan ; Mediterranean, Atlantic, Pacific, surface. 



2. Sagosphcera 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 Sagcnoscoia pencillata, but without pyramidal elevations on the 

 surface of the sphere.) 



DiTnensions. — Diameter of the sphere I'D to 1'5, length of the bars Ol to 015, breadth 0'002 to 

 0-004 



Habitat. — Antarctic Ocean, Station 154, surface. 



3. SagosphcBra 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 crucicornc, 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 O'l to 0'2, breadth 0'002. 



Habitat. — Xorth Pacific, Station 256, surface. 



4. Sagosphcera furcilla, n. sp. (PL 108, figs. 11, 11a). 



Eadial spines short, spinulate, with a spiny terminal knob (fig. 11a), 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 0'2 to 0'3, breadth 0'004. 



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



