REPORT ON THE RADIOLARIA. 1595 



1. Orosphoera hastigera, n. sp. 



Eadial spines cylindrical, straight, smooth, simple, about as long as the diameter of the spherical 

 shell, and as broad as its smooth bars. Meshes of the network irregularly polygonal, the majority 

 quadrangular, of different sizes. 



Dimensions. Diameter of the sphere TO to 1/2, length of the radial spines I/I to 1/5, 

 middle breadth 0-004. 



Habitat. Central Pacific, Station 272, depth 2600 fathoms. 



2. Orosphcera spinigera, n. sp. 



Eadial spines cylindrical, irregularly curved, thorny, simple, two to three times as long as the 

 diameter of the spherical shell, and as broad as its spiny bars. Meshes of the network irregularly 

 polygonal, the majority pentagonal. 



Dimensions. Diameter of the sphere 1'5 to T8, length of the spines 3'0 to 5'0, breadth O'OOG. 



Habitat. North Atlantic, Station 353, depth 2965 fathoms. 



3. Orosphcera fusigera, n. sp. 



Eadial spines slender, spindle-shaped, straight, smooth, about as long as the diameter of the 

 spherical or slightly ellipsoidal shell, in the thicker middle part five tunes as broad as the bars, and 

 tapering equally towards both ends. Meshes of the network irregularly polygonal, the majority 

 quadrangular, separated by smooth bars. 



Dimensions. Diameter of the shell 1/0 to 1/2, length of the spines 1/2 to 3/6, basal breadth 

 0-02, middle breadth 01. 



Habitat. North Pacific, Station 253, depth 3125 fathoms. 



4. Orosphcera foveolata, n. sp. 



Eadial spines spindle-shaped, straight, dimpled, half as long as the radius of the spherical shell 

 and three to five times as thick as the bars. Meshes irregular, polygonal, of very different shapes, 

 separated by dimpled bars. (Similar to Oroscena gegeribauri, PL 106, fig. 4, but with spherical 

 dimpled shell, without pyramidal elevations.) 



Dimensions. Diameter of the shell 2'0 to 2'4, length of the spines 0'05, breadth 015. 



Habitat. Central Pacific, Station 267, depth 2700 fathoms. 



5. Orosphcera serpentina, n. sp. (PI. 106, fig. l). 



Eadial spines cylindrical, dimpled, undulate or curved in a snake-like manner, about as long as 

 the diameter of the ellipsoidal or spherical shell and four to six times as broad as its smooth bars. 

 Meshes very irregular, polygonal. 



Dimensions. Diameter of the shell I'O to 1'2, length of the spines 012 to 015, breadth 012. 



Habitat. South Pacific, Station 289, depth 2550 fathoms. 



