REPORT ON THE RADIOLARIA. 1577 



ends arc either simply pointed or bear a terminal spatliilla, or a little crown of 



recurved teeth. According to these diflferences we may dispose the twenty-six 

 species described into four subgenera. 



Subgenus 1. Aulographantha, Haeckel. 



Definition. — Terminal branches of the radial tubes simple, smooth, without lateral 

 teeth and terminal spathill?e. Tubes usually thin and fragile. 



1. Aulogr aphis pandora, n. sp. (PI. 103, figs. 2-9). 



Radial tubes cyliudrical, sleinler, straight or slightly curved, of equal breadth. Terminal 

 branches of the tubes very variable in size and number (two to six, usually three or four), without 

 lateral teeth and terminal spathillse, slender, conical, slightly curved, directed outwards, twice to four 

 times (rarely five to eight times) as long as the breadth of the tubes. This species is extraordinarily 

 variable in the number and size of the simple terminal branches ; the eight tubes, shown in figs. 

 2 to 9, are all found in one and the same specimen. 



Dimensions. — Length of the tubes 0'5 to 1'5, breadth O'Ol to 0'03 ; branches 0'02 to 012. 



Habitat. — Cosmopolitan ; Mediterranean, Atlantic, Indian, Pacific ; surface and in various 

 depths. 



2. Aulographis bovicornis, n. sp. (PL 103, figs. 12-14). 



Radial tubes cylindrical, slender, straight, of equal breadth. Terminal branches usually two 

 (rarely three), smooth, without lateral teeth and terminal sijathill^, eight to ten times as long as 

 the breadth of the tube, pointed, S-shaped, or curved like the horns of an ox. 



Dimensions. — Length of the tubes 0-6 to 0'8, breadth 0'015 to 0-02 ; branches 01 to 0-2. 



Hahitat. — South Atlantic (east of Buenos Ayres), Stations 323 to 325, surface. 



3. Aulogixiphis taumorjjJia, n. .sp. (PI. 103, fig. IG). 



Radial tubes cyluidrical, slender, straight, gradually tapering towards the pointed proximal end. 

 Terminal branches constantly two, opposite in a tangentiah slightly concave or nearly straight Hue, 

 ten to twelve times as long as the breadth of the tube, smooth, straight in the proximal jDart, 

 recurved in the chstal part. 



Dimensions. — Length of the tubes 0'7 to O^S, breadth O'Ol to O'Olo; branches 01 to 015. 



Eahitat. — North Pacific, Station 231, depth 2250 fathoms. 



(ZOOL. CHALL. EXP. — PiRT XL. — 1886.) Rr 198 



