EEPORT ON THE RADIOLARIA. 131 



14. Xiphostylus emhenza, n. sp. (PI. 13, fig. 11). 



Pores irregular, roundish, one to four times as broad as the hum ; six to eight on the half 

 equator. Polar spines very unequal ; major cylindrical, twice as long as the axis of tlie sphere ; 

 minor scarcely half as long, obliquely inserted, like a bird's head, surrounded by a group of ten to 

 twenty smaller conical spines. Opposite hemisphere smootli. 



Dimensions. — Diameter of the sphere O'OOS, pores 0'002 to O'OOS, bars 0'002 ; length of the 

 major spine 0'09, of tlie minor 0-05, basal breadth O^Ol. 



Habitat. — South Atlantic, Station 332, surface. 



15. Xiphostylus ardea, n. sp. 



Pores iiTegular, roundish, one to three times as broad as the bars ; twelve to sixteen on the half 

 equator. Wliole surface spiny. Major polar spine three-sided pyramidal, somewhat longer than 

 the diameter of the sphere ; minor scarcely so long as its half radius, jJommel-like, edged. 



Dimensions. — Diameter of the sphere 0"12, pores 0'003 to O'Ol, bars 0'003 ; lengtli of tlie 

 major polar spine 0'15, of the minor 0"03, basal breadth 0'02. 



Hahitat. — Nortla Atlantic, Station 64, surface. 



Genus 47. Saturnalis,^ Haeckel, 1881, Prodromus, p. 450, 



Definition. — S t y 1 o s p h a3 r i d a ^dth one single lattice-sphere and two equal 

 opposite spines, connected at the distal end by a circular or elliptical ring. 



The genus Saturnalis (with simple lattice-sphere) and the two similar genera 

 Saturnulus (with two concentric spheres) and Saturninus (with three spheres) form 

 together the small peculiar grouj) of Saturnalida, distinguished by a remarkable cii'cular 

 or elliptical ring, connecting the distal ends of the two equal opposite polar spines. This 

 ring' indicates a certain equatorial plane, and therefore brings these S p h je r o i d e a 

 into relation with the D i s c o i d e a. 



Subgenus 1. SaturnaUna, HaeckeL 

 Definition. — Ring smooth, without spines or thorns. 



1. Saturnalis circularis, n. sp. 



Pores of the spherical shell regular, circular, hexagonaUy framed, twice as broad as the bars. Ten 

 to twelve pores on the half equator. Eing circular, smooth, its diameter three times as great as that 

 of the sphera 



' &(«rna/fs = Similar t< Saturnus, with u liiiK 



