[1896. 



MICROSCOPICAL JOURNAL. 



241 



Radiolaria, a New Species. 



REV. FRED'K B. CARTER, 



MONTCLAIR, N. J. 



Stauralastrum trispinosum, N. 8p. 



Arms four times as long as broad at their base, at their 

 distal end triangular in shape, two and a half times as 

 broad as at their base ; their distal breadth two and a 

 half times as large as the diameter of the central disk, 

 which exhibits two to three rinjrs. Arms enlarged at 



both basal and distal ends. On the end of each arm three 

 strong conical spines, one in the middle and one on either 

 side, the latter two so placed that if their edges were pro- 

 duced the resulting form would be a triangle. 



Dimensions. — Radius of each arm (without terminal 



