REPORT ON THE RADIOLARIA. clxxxvii 



1862. BURY (L. N. 17) gives in an atlas of twenty-five plates, photographed from drawings, the 

 figures of numerous fossil Polycystina of Barbados (without descriptions), of which many 

 are new species overlooked by Ehrenberg (compare 242, above). 



1872. EHRENBERG (L. N. 24) gives a list of names (without description) of all the Polycystina 

 observed by him from the bottom of the sea, 279 species, of which 127 are figured on 

 twelve plates. 



1875. EHEENBERG (L. N. 25) gives a list of names of all the fossil Polycystina observed by him 



(from Barbados, the Nicobar Islands and Sicily), 326 species, of which 282 are figured 

 (compare 242 above). In a new " Systematic Survey of the Genera " the number of 

 these is given as 63. The 7 families are the same as given in 1847 (see above), as also 

 the two orders (NASSELLARIA = Solitaria, SPUMELLARIA = Composita). 



1876. ZITTEL (L. N. 29) describes the first fossil Eadiolaria from the chalk (6 species) and 



establishes the new Cyrtoid genus Dictyomitra. 



1876. JOHN MURRAY (L. N. 27) establishes the new family Challengerida, and figures 6 new 

 generic types of PH^ODARIA. 



1879. RICHARD HERTWIG (L. N. 33) first describes the fundamental differences in the structure of 

 the central capsule, and in accordance with them divides the Radiolaria into six orders : 

 (1) Thalassicollea, (2) Sphserozoea, (3) Peripylea, (4) Acanthometrea, (5) Monopylea, 

 (6) Tripylea (p. 133). These are subdivided into 18 families, and their phylogenetic 

 affinities discussed (p. 137). On the ten plates, several new species from Messina are 

 figured, among them the types of several new genera (Cystidium, Ccelacantha, JSchinosphcera) 

 (compare 252). 



1879. ERNST HAECKEL (L. N. 34) founds the order PH;EODARIA as a "new group of marine siliceous 



Rhizopods," and distinguishes in it 4 suborders, 10 families and 38 genera. 



1880. EMIL STOHR (L.N. 35) describes the Miocene "Radiolarian fauna of the tripoli from Grotte in 



Sicily," 118 species, of which 78 are new ; among them is the new genus Ommatodiscus, 

 the type of a new family, Ommatodiscida. The new species are figured on seven plates. 



1880. DANTE PANTANELLI (L. N. 36) describes 30 species of fossil Polycystina from the jaspers 



of Tuscany, which he regarded as Eocene, but which were probably of Jurassic origin 

 (compare 243, note B, above). 



1881. ERNST HAECKEL (L. N. 37) publishes a " Sketch of a classification of the Radiolaria on the 



basis of the study of the Challenger Collection," and distinguishes in his " conspectus 

 ordinum" (p. 421) 2 subclasses and 7 orders, and in the "prodromus systematis 

 Radiolarium " (pp. 423-472) 24 families with 630 genera, among which are more than 

 2000 new species. 



1882. BUTSCHLI (L. N. 40) on the basis of studies of the fossil Monopylea of Barbados, investigates 



the " mutual relations of the Acanthodesmida, Zygocyrtida and Cyrtida," and gives a 

 critical revision of the genera of these " Cricoidea ; " a number of new species are 

 described and figured (Tafs. xxxii., xxxiii.), and some new genera of Stichocyrtida 

 established (Lithostrdbus, Lithomitra, &c.). 



1882. DUNIKOWSKI (L. N. 44) describes 18 new fossil Polycystina from the lower lias of the 

 Salzburg Alps, among them the types of 3 new genera (Ellipsoxiphus, Triactinosphcera, 

 and Spongocyrtis). 



