REPORT ON THE RADIOLARIA. clxxv 



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

 of which 29 are still living. 



C. TeiTScher, 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 Spumellakia 

 and Nassellaeia 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 yeai's into the 

 recent deep-sea Eadiolaria of the Challenger collection and the ]\Iiocene Polycystina of Barbados, 

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



