REPORT ON THE RADIOLARIA. 1623 



Subgenus 2. AulosphcereUa, Haeckel. 



Dejinition. — Radial tubes smooth, without lateral branches or spines, but armed 

 with a verticil of teeth at the distal end. 



3. Aulosphcera dlodon, n. sp. 



Eadial tubes cylindro-couical, straight, smooth, of the same length as the smooth, cyhndrical, 

 tangential tubes ; armed at the distal end with two divergent terminal teeth, which are sUghtly 

 curved, pincer-shaped, and about one-fourth as long as the tube. 



Dimensio7is. — Diameter of the sphere 2 '5 ; tangential tubes OIG long, O^OOS broad. 



Habitat. — South Atlantic, Station 332, depth 2200 fathoms. 



4. AidosphcBra triodon, n. sp. (PL 109, fig. 8). 



Eadial tubes cylindrical, straight, smooth, two to three times as long as the smooth, cylindrical, 

 tangential tubes ; armed at the chstal end with three divergent terminal teeth, which are straight 

 or slightly curved and about one-third as long as the tube. 



Dimensions. — Diameter of the sphere 1"2 ; tangential tubes O'l long, O'Ol broad. 



Habitat. — North-Eastern Pacific (off Japan), Station 231, surface. 



5. Aidos2:>h(era tetrodon, n. sp. 



Eadial tubes slender, cylindrical, straight, smooth, about three times as long as the smooth, 

 cylindrical, tangential tubes ; armed at the distal end with a regular cross of four terminal teeth, 

 which are directed almost horizontally, and are shghtly recurved (just as in Aulosphcera spathillata, 

 PI. 109, fig. 7, but longer and without lateral verticils). 



Dimensions. — Diameter of the sphere 1'6 ; tangential tubes 015 long, 0'005 broad. 



Eahitat. — South Pacific, Station 289, depth 2550 fathoms. 



6. AidosphcBra polyodon, n. sp. 



Eadial tubes slender, spindle-shaped, gradually tapering towards the two ends, smooth, about 

 twice as long as the cyhndrical, smooth, tangential tubes ; armed at the distal end with a verticil 

 of twelve to twenty or more divergent, conical, shghtly curved teeth. 



Dimensions. — Diameter of the sphere 3"3 ; tangential tubes 0'2 long, O'Ol broad. 



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



Subgenus 3. AulosphcBrissa, Haeckel. 



Definition. — Radial tubes verticillate, armed with a variable number of regular 

 verticils of lateral branches. 



