REPORT ON THE RADIOLARIA. 1625 



a terminal spathilla ; the proximal branches are twice as long as the distal, and alternate with tliem 

 regularly, so that the six branches lie in six different meridional planes. 



Dimensions. — Diameter of the sphere 2'5 ; tangential tubes 02 long, 001 broad. 



Hahiiat. — Antarctic Ocean, Station 156, surface. 



12. Aulosphcsra dendroj^hora, u. sp. (PI. 109, fig.s. 1, 2). 



Radial tubes cylindrical, straight, about as long as the cylindrical, smooth, tangential tubes, 

 armed in the distal half with three verticils of four crossed branches ; the four proximal branches 

 are three times as long as the four distal, and twice as long as tlie four intermediate branches. 

 All twelve branches bear a terminal spinulate knob, and lie in two perpendicularly crossed 

 meridian planes. 



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



Hahitat. — Central Pacific, Station 271, depth 2-42o fathoms. 



13. Aulusphcera sceptrophora, u. sp. (PL 109, figs. 3, 4). 



Radial tubes straight, in the proximal half conical, with inflated base ; in the distal half 

 cylindrical, with five or six cruciate verticils, each of which has four perpendicularly crossed teeth. 

 Tangential tubes half as long as the radial tubes, in the middle part very thin, thickened towards 

 both ends. 



Dimensions. — Diameter of the sphere 1^2 ; tangential tubes O'l long, 0'002 broad in the middle 

 part, 0"012 on both ends. 



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



14. AulosphcBra spatliop)honi, n. sp. 



Radial tubes slender, cylindrical, more or less curved, about three times as long as the 

 tangential tubes, in the distal half with eight to twelve verticils of six to eight lateral branches, 

 which are forked, decrease in length towards the distal end, and bear on each ramule a terminal 

 spathilla. Tangential tubes slightly curved and thorny. (Similar to Aulopleijma pcrpkxum, 

 PI. Ill, fig. S«, but with a simple lattice-sphere.) 



Dimensions. — Diameter of the sphere 2'2 ; tangential tubes 0'2 long, 0"006 broad. 



Ealitat. — North Pacific, Station 244, depth 2900 fathoms. 



Subgenus 4. AulosphcBr omnia, Haeckel. 



Definition. — Radial tubes spiuy or tlioruy, with irregular lateral branches, often 

 with forked distal ends. 



(ZOOL. CHALL. EXP. PART. XL. — 1886.) Rr 204 



