JIEPOIIT ON THE EADIOLARIA. 1035 



primary ring. The vertical axis of the slender ovate shell is much greater thau the 

 transverse. The network is very delicate, with very small and numerous triangular 

 or polygonal pores. Tlie central capsule encloses peculiar concrements (PI. 96, fig. 28). 



1. Ceplialospyris cancellata, n. sp. (PI. 83, fig. 10). 



yheU slender ovate, two and a lialf times as long as broad, with deep sagittal stricture and 

 complete ring. Network very delicate, with very small and numerous, irregular polygonal pores. 

 Tlie two large apical holes are separated by a latticed triangular sagittal septum, the apex of which 

 represents a rudimentary horn. Basal plate with two large coUar holes. Three feet slightly 

 curved, divergent, about half as long as the breadth of tlie slicll ; the caudal foot slender, much 

 thinner than the two stout pyramidal pectoral feet. 



Dimensions. — Shell 0'32 long, 0'13 broad. 



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



2. Cephalo.'^pyris ovata, n. sp. 



Shell slender, ovate, twice as long as liroad, with deep sagittal stricture and complete ring. 

 Network very delicate, with very small and numerous triangular pores (on both poles intermingled 

 with irregular polygonal pores). The two large apical holes are separated by a latticed triangular 

 sagittal septum, the upper edge of which is concave and bears two rudimentary horns. Basal plate 

 with four large collar holes. Three feet latticed, slightly curved, convergent, scarcely one-eighth as 

 long as the breadth of the shell. The central capsule filled up by concrements. 



Dimensions. — Shell 0'32 long, 0'16 broad. 



Habitat. — Central Pacific, Station 271, depth 2425 fathoms. 



3. Ceplialospyris triangulata, n. sp. (PI. 96, fig. 28). 



Shell ovate, one and a half times as long as broad, with deep sagittal stricture and complete 

 ring. Network very delicate and regular, with small triangular pores of equal size. The two larcre 

 apical holes are separated by a latticed semilunar septum, the upper edge of which is concave, and 

 bears two rudimentary horns. Basal plate with three large collar holes (?). Three feet latticed, 

 conical, nearly parallel and vertical (the caudal curved), about half as long as the breadth of the 

 shell. The ovate central capsule contains peculiar amyloidal concentric concrements. 



Dimensio7is. — Shell 0'2 long, 0'14 broad. 



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



Subfamily 2. Dipospyeida, Haeckel, 1881, Prodromus, p. 441. 



Definition. — Zygospyrida dipoda, with two descending lateral basal feet 

 (probably corresponding to the pectoral feet of Cortina). 



