REPORT ON THE RADIOLARIA. clxxv 



B. Stohr, in his list of Miocene Radiolaria from Grotte (L. N. 35, p. 84, 1880), records 118 species, 

 of which 29 are still living. 



C. Teuscher, who at my request has made a large number of comparative measurements and 

 drawings, both of fossil and living Eadiolaria, comes to the conclusion that numerous SPUMELLARIA 

 and NASSELLAKIA from Barbados are to-day extant and unchanged in the Eadiolarian ooze of the 

 deep Pacific Ocean (compare 242A, and p. 1760, Note). 



D. From the comparative investigations, which I have made during the last ten years into the 

 recent deep-sea Piadiolaria of the Challenger collection and the Miocene Polycystina of Barbados, 

 it appears that about a quarter of the latter are identical with living species of the former. 



