REPOKT ON THE RADIOLARIA. 157 



one mesh ; two opposite larger spines as long as the diameter of the sheU, two smaller only 

 as long as the radius. 



Dimensions. — Diameter of the shell 015, pores O'Ol, bars 0-005 ; length of the major spines 

 016, minor O'OS. 



Hahitat. — Central Pacific, Station 274, depth 2750 fathoms. 



2. Staurostylus latinus, n. sp. 



Shell thin walled, smooth, with regular, circular, double-edged pores, three times as broad as 

 the bars; twelve to fourteen on the quadrant. Spines conical, twice as broad at the base as 

 one mesh ; two opposite larger spines as long as the radius of the sheU, two smaller only one-third 

 as long. 



Dimensions. — Diameter of the shell 0'24, pores 0-012, bars 0'004; length of the major spines 

 0-12, minor 0-04. 



Hahitat. — South Pacific, Station 295, depth 1500 fathoms. 



3. Staurostylus germanicus, n. sp. 



Shell thick walled, covered with bristle-shaped by-spines, half as long as the radius. Pores 

 regular, circular, hexagonally framed, twice as broad as the bars ; eight to ten on the 

 quadrant. Prom each hexagon-corner arises one short by-spine. Four main spines three-sided 

 pyramidal, as broad at the base as one mesh ; two opposite larger spines one and a half times 

 as long as the radius, two smaller two-thirds as long. 



Dimensions. — Diameter of the shell 016, pores 0-008, bars 0-004 ; length of the major spines 

 0-12, minor O'OS. 



Habitat. — ISTorth Pacific, Station 244, depth 2900 fathoms. 



Genus 62. Stylostaurus,^ 1881, Prodromus, p. 450. 



Definition. — Stau rosphserida with one single lattice-sphere and four crossed 

 spines, one of which is much larger than the other three. 



The genus Stylostaurus diflfers from the preceding in the extraordinary development 

 of one of the four spines, which is much longer than the other three ; these may be 

 equal or different. 



1. Stylostaurus caudatus, n. sp. (PI. 13, fig. 7). 



Shell thick walled, smooth, with regular, circular, hexagonally framed pores, twice as broad as 

 the bars ; five to six on the quadrant. Spines three-sided pyramidal, as broad at the base as 



1 Stylostaurus, Style-cros3 ; (rrv'hos, ctuv^os. 



