REPORT ON THE RADIOL ARIA. 109 



Dimensions. — Diameter of the shell Ol to 012, of the pores 0-002 to O'Ol ; length of the tuhuli 

 0-05 to 007. 



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



3. Mazosphcera Icevis, Ehreiiberg. 



Mazosphmra lends, Ehrenberg, 1872, AbhandL d. k. Akad. d. Wiss. Berlin, p. 297, Taf. vii. fig. 7. 



SheU spherical, with very small pores, scarcely one-fourth as broad as the bars. Fifteen to 

 twenty pores on the half meridian of the shelL Between them, irregularly distributed, a variable 

 number (fifteen to twenty) of short conical tubules, about as long as broad, only one-fifth to one- 

 sixth as long as the sbeU radius. Mouth of the tubuli truncated, with an obtuse short tooth on 

 one side. 



Dimensions. — Diameter of the shell 0'08 to 0O9, of the pores O'OOl to 0'002, of the bridges 

 0-005 to 0-008 ; length of the tubuli 0-01 to 0-02, breadth of them the same. 



Habitat. — Philippine Islands (depth 3300 fathoms), Ehrenberg j Station 206, depth 2100 

 fathoms ; Station 225, depth 4575 fathoms. 



4. Mazosphcera apicata, Ehreuberg. 



Mazospluvra apicata, Ehrenberg, 1872, IMonatsber. d. k. preuss. Akad. d. Wiss. Berlin, p. 316. 



SheU spherical, without small pores, only with a variable number (ten to twenty) of 

 short conical tubules, twice as long as broad, and half as long as the shell radius. Mouths of 

 the tubuli obliquely truncated, with a strong acute tooth on one side. (This, species differs from 

 the two preceding by the want of the small pores between the tubules.) 



Dimensions. — Diameter of the shell 0-08 to 0-1, of the tubules 0-01. 



^a&ite<.— Philippine Islands (depth 3300 fathoms), Ehrenberg ; north coast of New Guinea, 

 depth 2000 fathoms; Station 217. 



Genus 38. TrypanosphcBra ^ n. gen. 



Definition. — C ollospli se r i da -with simple shells, the pores of which are pro- 

 longed into external simple radial tubuli -with solid walls ; outer mouth of each tubulus 

 armed with a coronal of spines. 



The genus TrypanosplicBra is intermediate between Siphonosphwra and Chcenico- 

 uphcera, agreeing with the former in the tubular prolongation of the pores, with the 

 latter in the possession of a coronal of teeth on their outer opening. 



Subgenus 1. Trypanosphcerula, Haeckel. 

 Definition. — All pores of the shell prolonged into short coronated tubules. 



' Trj/fiawosp/iOEra = Auger-sphere ; T^vvavoii, afal^a. 



