MESOZOIC AND CAINOZOIC DINOFLAGELLATE CYSTS 



Genus Wetzeliella Eisenack 



Subgenus Wetzeliella (Wetzeliella) Eisenack 

 Wetzeliella (Wetzeliella) articulata Eisenack 

 var. conopia nov. 

 clathrata Eisenack 

 coleothrypta sp. n. 

 reticulata sp. n. 

 tenuivirgula sp. n. 

 var. crassoramosa nov 

 homomorpha Deflandre & Cookson 

 var. quinquelata nov 

 ovalis Eisenack 

 condylos sp. n. 

 similis Eisenack 

 solida (Gocht) 

 symmetrica Weiler 

 var. lobisca nov. 

 varielongituda sp. n. 

 Subgenus Wetzeliella (Rhombodinium) Gocht 

 Wetzeliella (Rhombodinium) glabra Cookson 

 X. Further dinoflagellate cysts from the Speeton 

 (lower cretaceous) (W. A. S. Sarjeant) 

 Introduction ..... 

 Genus Netrelytron Sarjeant 

 Nett elytron trinetron sp. n. 

 Other Species .... 



Genus Par anetr elytron nov. 



Paranetrelytron strongylum sp. n. 

 Genus Muderongia Cookson & Eisenack 



Muderongia staurota sp. n. 

 Genus Apteodinium Eisenack 



Apteodinium maculatum Eisenack & Cookson 

 Genus Doidyx nov. 



Doidyx anaphrissa sp. n. 

 Genus Broomea Cookson & Eisenack . 



Broomea longicornuta Alberti 

 Genus Odontochitina Deflandre . 



Odontochitina operculata (O. Wetzel) 

 Genus Fromea Cookson & Eisenack 



Fromea amphora Cookson & Eisenack 

 Genus Systematophora Klement 



Systematophora schindewolfi (Alberti) 

 Genus Gardodinium Alberti 



Gardodinium eisenacki Alberti 

 Genus Dingodinium Cookson & Eisenack 



Dingodinium albertii sp. n. 

 Genus Pareodinia Deflandre 



Pareodinia ceratophora Deflandre 

 Genus Sirmiodinium Alberti 



Sirmiodinium grossi Alberti 

 Genus Cometodinium Deflandre & Courteville 

 Cometodinium sp. .... 



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