AND CAINOZOIC DINOFLAGELLATE CYSTS " 17 



Deflandre, 1937 ; 73, pi. 15 figs. 3-4 (Transferred to Baltisphaeridium by Downie 

 & Sarjeant, 1963 ; 93). Upper Cretaceous, France. 



Prolixosphaeridium mixtispinosum (Klement) Davey, Downie, Sarjeant & 

 Williams, comb, nov., = Baltisphaeridium mixtispinosum Klement, i960 ; 

 58-9, pi. 6 figs. 17-19. Upper Jurassic, Germany. 



Prolixosphaeridium parvispinum (Deflandre) Davey, Downie, Sarjeant & 

 Williams, comb, nov., = Hystrichosphaeridium xanthiopyxides var. parvispinum 

 Deflandre, 1937 ; 29, pi. 16 fig. 5 (Raised to specific rank, as Hystrichosphaeri- 

 dium parvispinum, by Cookson & Eisenack, 1958 ; 45 ; transferred to Balti- 

 sphaeridium by Klement, i960 ; 59). Upper Cretaceous, France. 



? Prolixosphaeridium xanthiopyxides (O. Wetzel) Davey, Downie, Sarjeant & 

 Williams, comb, nov., =Hystrichosphaera xanthiopyxides O. Wetzel, 1933, 

 44-5 ; pi. 4 fig. 25 (Transferred to Hystrichosphaeridium by Deflandre, 1937 ; 

 77 ; transferred to Baltisphaeridium by Klement, i960 ; 59). Upper Creta- 

 ceous, Germany. 



Systematophora placacantha (Deflandre & Cookson) Davey, Downie, Sarjeant & 

 Williams, comb, nov., = Hystrichosphaeridium placacanthum Deflandre & 

 Cookson, 1955 ; 276-7, pi. 9 figs. 1-3 (Transferred to Baltisphaeridium by 

 Downie & Sarjeant, 1963 ; 92). Miocene, Australia. 



V. GENERIC REALLOCATIONS PROPOSED BY 

 G. L. WILLIAMS & C. DOWNIE 



Adnatosphaeridium aemulum (Deflandre) Williams & Downie, comb, nov., 

 = Hystrichosphaeridium aemulum Deflandre, 1938 ; 187-9, P^ 9 %• 12 > pi- I0 

 figs. 5-8, pi. 11 figs. 1-7 (Transferred to Cannosphaeropsis by Deflandre, 1947a ; 

 1574). Upper Jurassic, France. 



Adnatosphaeridium caulleryi (Deflandre) Williams & Downie, comb, nov., 

 = Hystrichosphaeridium caulleryi Deflandre, 1938 ; 189, pi. 11 figs. 2-3 (Trans- 

 ferred to Cannosphaeropsis by Deflandre, 1947 ; 1574). Upper Jurassic, 

 France. 



Adnatosphaeridium filamentosum (Cookson & Eisenack) Williams & Downie, 

 comb, nov., = Cannosphaeropsis fdamentosa Cookson & Eisenack, 1958 ; 47-8, 

 pi. 7 figs. 8-9, pi. 8 figs. 1-2. Middle-Upper Jurassic, Australia. 



Adnatosphaeridium filiferum (Cookson & Eisenack) Williams & Downie, comb, 

 nov., =Cannosphaeropsis utinensis var. filifera Cookson & Eisenack, 1958 ; 

 46, pi. 7 fig. 4 (Raised to specific rank, as Cannosphaeropsis filifera, by Cookson 

 & Eisenack, 1960a ; 8-9). Upper Cretaceous, Australia. 



Hystrichokolpoma clavigera (Deflandre) Williams & Downie, comb, nov., 

 = Hystrichosphaeridium clavigerum Deflandre, 1937 ; 71, pi. 14 figs. 1-2 

 (Transferred to Baltisphaeridium by Downie & Sarjeant, 1963 ; 91). Upper 

 Cretaceous, France. 



