REPORT ON THE RADIOLARIA. 819 



Subgenus 3. Stegaspis, Haeckel, 1881, Prodromus, p. 468. 



Definition. Free apophyses of the radial spines branched, and by reunion of their 

 anastomosing branches forming perforated shields. 



5. Orophaspis diporaspis, n. sp. 



Parmal pores of the shell circular, of the same size as the sutural pores and the bars. Eadial 

 spines sword-shaped, two-edged, very broad ; each spine bears an elliptical free shield with two 

 longish pores (opposite on the two flat sides of the sword). Distance of the twenty free two-pored 

 shields from the shell about equal to its diameter. 



Dimensions. Diameter of the shell 0'04, of the pores 0'004. 



Habitat. South Pacific, Station 295, surface. 



6. Orophaspis tessaraspis, n. sp. 



Parmal pores of the shell roundish, somewhat larger than the sutural pores and the bars. 

 Eadial spines very long, compressed ; each spine bears a roundish free shield with four irregular 

 pores disposed in a cruciform manner, the two larger pores being opposite on the flat sides of the 

 spine, the two smaller being opposite but on its two edges. Distance of the twenty free four- 

 pored shields from the shell about equal to its radius. 



Dimensions. Diameter of the shell 0'05, of the pores O003. 



Habitat. North Pacific, Station 239, surface. 



Genus 354. Ceriaspis, 1 Haeckel, 1881, Prodromus, p. 468. 



Definition. D orataspida with twenty plates, which are perforated by forty 

 aspinal pores (two pores in each plate). Surface of the shell with numerous dimples, 

 separated by a network of elevated combs. No by-spines. 



The genus Ceriaspis has the same structure of the shell, as its ancestral form 

 Dorataspis, differing from it only in the development of high combs or crests, which 

 form on the surface of the shell a peculiar elevated network. The dimples or funnel- 

 shaped pits between these combs are either all or partly perforated by the pores of the 

 shell. Both the aspinal pores of each plate are usually placed in one common dimple, 

 whilst each sutural pore is placed in its peculiar smaller dimple. 



Subgenus 1. Ceriasparium, Haeckel. 



Definition. Shell-surface with seventy to one hundred or more small funnel- 

 shaped dimples, each of which opens on the bottom by one pore or by a couple of 



1 Ceriaspis = Dimply shield ; x/ij/ox, tin'tl;. 



