REPORT ON THE RADIOLARIA. 1609 



3. Sagoscena prsetonum, n. sp. (PI. 108, fig. 7). 



Pyramids subregular, of equal size and similar form, usually four-sided, crowned at the distal 

 top with three or four divergent apical spines, which bear some irregular verticils of lateral and 

 terminal branches. (Some five-sided and some six-sided pyramids are often intermingled with the 

 four-sided.) 



Dimensions. Diameter of the sphere 2 - 6, length of the bars 0'3, breadth O'OOG. 



Habitat. Central Pacific, Stations 271 to 274, surface. 



4. Sagoscena pellorium, n. sp. (PI. 108, fig. 5). 



Pyramids subregular, of equal size and similar form, usually five-sided or six-sided, crowned 

 at the distal end with three to six divergent apical spines, which bear an irregularly spinulate 

 terminal knob. (The size and form of the apical spines is here very variable, as well as the number 

 of the edges of the pyramids, which -varies between three and six.) 



Dimensions. Diameter of the sphere 3'2, length of the bars O15 to 0'25, breadth O'OOS. 



Habitat. Antarctic Ocean, Station 156, surface. 



5. Sagoscena cruciarium, n. sp. 



Pyramids subregular, usually six-sided (intermingled with single five-sided and seven-sided or 

 eight-sided forms), crowned at the distal top with three divergent, slender, apical spines, each of 

 which bears three to six regular cruciate verticils ; the four crossed lateral branches of each 

 verticil bearing a spinulate terminal knob. (Similar to Sagoplcgma scenophora, PL 108, fig. 13.) 



Dimensions. Diameter of the shell 2 '5, length of the bars 0'2 to 0'3, breadth 0'004. 



Habitat. North Pacific, Stations 240 to 244, surface. 



6. Sagoscena debilis, n. sp. 



Pyramids more or less irregular, with four, five, or six sides, of somewhat different form and 

 unequal size ; crowned at the top with one, two, or three slender apical spines, of variable length. 

 These spines as well as the bars of the network bear scattered cruciate verticils, each usually 

 composed of four crossed, small, lateral branches. 



Dimensions. Diameter of the shell 2 to 3'0, length of the bars 01 to 0'15, breadth 0'003. 



Habitat. Central Pacific, Stations 263 to 274, surface. 



7. Sagoscena gracilis, Haeckel. 



Aulospluira gracilis, R. Hertwig, 1879, Organism, d. Radiol., p. 91, Taf. ix. fig. 4. 



Pyramids more or less irregular, with five, six, or seven sides, often of somewhat different form 

 and unequal size ; crowned at the top with a single radial spine, which has the same size as the 



(ZOOL. CHALL. EXP. PART XL. 1886.) Rr 202 



