REPORT ON THE RADIOLARIA, 1079 



1. TJioIosjii/ris trijiodiscus, n. sp. (PI. 89, fig. 1). 



Shell campanulate, smooth, as broad as long, with deep sagittal stricture. Cephalis com- 

 pressed, with irregular roundish pores ; two or three pairs of larger annular pores on each side of 

 the rmg. Basal plate with four large pores. Galea with two very large opposite holes (an 

 occipital and a frontal opening). A slender free perpendicular columella connects the uppermost 

 part of the sagittal ring with the strong three-sided pyramidal apical horn. All three feet of 

 equal length, half as long as the ring, three-sided, prismatic, divergent, with three dentated edges. 



Dimensions. — Shell OlS diameter, ring 0-08 long, feet 0-05 long. 



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



2. Tliolospyris fenestrata, n. sp. (PI. 89, fig. 2). 



Shell roundish polyhedral, smooth, with slight sagittal stricture. Cephalis nearly cubical, with 

 irregularly roundish pores ; two or three pairs of larger pores on each side of the ring. Basal plate 

 with two very large pores. Galea pyramidal, with two large occipital holes. Columella enclosed 

 in the dorsal wall of the galea, prolonged into an oblique pyramidal spine of the same length. Two 

 pectoral feet pyramidal, nearly vertical and as long as the ring, twice as long as the caudal foot. 



Dimensions. — Shell 012 diameter, ring 0-07, pectoral feet 0-05 long. 



Habitat. — Central Pacific, Station 266, depth 2750 fathoms. 



3. Tholospyris galeata, n. sp. 



Shell helmet-shaped, thorny, with deep sagittal stricture. Cephahs campanulate, with sub- 

 regular circular pores. Basal plate with three large pores. Galea hemispherical, separated from 

 the cephalis by a sharp horizontal stricture ; pores smaller. A slender free columella connects the 

 apex of the ring with the strong conical apical horn, which is half as long as the ring. All three 

 feet of equal length, divergent conical, as long as the horn. 



Dimmsions. — Shell 014 diameter, ring 0-09 long, feet 0'08 long. 



Habitat. — Central Pacific, Station 263, depth 2650 fathoms. 



Subgenus 2. TJiolospyridium, Haeckel. 

 Definition. — Basal feet forked or brauched. 



4. Tliolospyris rainosa, n. sp. (PI. 89, fig. 3). 



Shell helmet-shaped, smooth, with deep sagittal stricture. Cephalis nearly spherical, with irre- 

 gularly polygonal pores ; four or five pairs of larger annular pores on each side of the strong angular 

 ring. Cupola flat, conical, with two pairs of larger pores. Columella enclosed in its dorsal wall. 



