6 APPENDIX TO "STUDIES ON MESOZOIC 



}Litosphaeridium truncigerum (Deflandre) Davey & Williams, comb, nov., 

 = Hystrichosphaeridium truncigerum Deflandre, 1937 ; 71-2, pi. 13 figs. 6-7. 

 Upper Cretaceous, France. 



ICordosphaeridium cantharellum (Brosius) Davey & Williams, comb, nov., 

 =Hystrichosphaeridiitm cantharellum Brosius, 1963 ; 40-1, pi. 6 fig. 1, text-fig. 

 2 nos. na-c. Oligocene, Germany. 



?Cordosphaeridium erectum (Manum & Cookson) Davey & Williams, comb, 

 nov., = Hystrichosphaeridium erectum Manum & Cookson, 1964 ; 14, pi. 3 

 figs. 5-6. Cretaceous, Arctic Canada. 



Perisseiasphaeridium eisenackii Davey & Williams, sp. nov., =Hystricho- 

 sphaeridium anthophorum sensu Eisenack, 1958 ; 402, pi. 26 figs. 1-2 non 

 Cookson & Eisenack, 1958. Holotype : the specimen figured by Eisenack, 

 1958 ; pi. 26 fig. 1, and contained in his Slide Ob. Apt. no. 31. Dimensions of 

 holotype : diameter of central body 55 [i, overall diameter iiojj.. Lower Creta- 

 ceous (Upper Aptian), Germany. (Name originally proposed by Davey & 

 Williams, 1966b ; 79 : invalid under Art. 37, since the holotype was not 

 designated). 



?Polysphaeridium asperum (Maier) Davey & Williams, comb, nov., =Hystricho- 

 sphaeridium asperum Maier, 1959 ; 319: pi. 33 fig. 2. Miocene, Germany. 



IPolysphaeridium deflandrei (Valensi) Davey & Williams, comb, nov., =Hystri- 

 chosphaeridium deflandrei Valensi, 1947 ; 817-8, text-fig. 3. Middle Jurassic 

 France. 



tPolysphaeridium fabium (Tasch) Davey & Williams, comb, nov., =Hystricho- 

 sphaeridium fabium Tasch, in Tasch, McClure & Oftedahl, 1964 ; 195, pi. 2 

 fig. 5. Lower Cretaceous, Kansas, U.S.A. 



}Polysphaeridium follium (Tasch) Davey & Williams, comb, nov., =Hystricho- 

 sphaeridium follium Tasch, in Tasch, McClure & Oftedahl, 1964 ; 195, pi. 1 

 fig. 8. Lower Cretaceous, Kansas, U.S.A. 



}Polysphaeridium fucosum (Valensi) Davey & Williams, comb, nov., =Micrhy- 

 stridium fucosum Valensi, 1955a ; 40, text-fig. 2b (Transferred to Hystricho- 

 sphaeridium by Downie and Sarjeant, 1963 ; 93). Cretaceous, France. 



?Polysphaeridium major (Lejeune-Carpentier) Davey & Williams, comb, nov., 

 = Hystrichosphaeridium major Lejeune-Carpentier, 1940 ; 220-1, text-fig. 13. 

 Upper Cretaceous, Belgium. 



}Polysphaeridium marsupiutn (Tasch) Davey & Williams, comb, nov., ^Hystri- 

 chosphaeridium marsupium Tasch, in Tasch, McClure & Oftedahl, 1964 ; 193, 

 pi. 3 fig. 16. Lower Cretaceous, Kansas, U.S.A. 



}Polysphaeridium paulinae (Valensi) Davey & Williams, comb, nov., =Micrhy- 

 stridium paulinae Valensi, 1953 ; 48, pi. 12 fig. 6 (Transferred to Hystricho- 

 sphaeridium by Downie and Sarjeant, 1963 ; 93). Middle Jurassic, France. 



? Polysphaeridium perovatum (Tasch) Davey & Williams, comb, nov., ^Hystri- 

 chosphaeridium perovatum Tasch, in Tasch, McClure & Oftedahl, 1964 ; 194, 

 pi. 3 fig. 13. Lower Cretaceous, Kansas, U.S.A. 



