MESOZOIC AND CAINOZOIC DINOFLAGELLATE CYSTS 



33 



1838 

 1838 

 1854 

 1854 

 1932 

 1932 



1935 

 1936 

 1937 

 1937 

 1937 

 1941 



1947 

 1947 

 1952 

 1952 

 1964 



Hystrichosphaera ramosa (Ehrenberg) var. ramosa nov. 

 PI. 1, figs. 1, 6 ; PI. 3, fig. 1 ; Text-fig. 8 



Xanthidium ramosum Ehrenberg, pi. i, figs, i, 2, 5. 

 Xanthidium furcatum Ehrenberg, pi. 1, figs. 12, 14. 

 Xanthidium ramosum Ehrenberg, pi. 7, figs. 9, 10. 

 Xanthidium furcatum Ehrenberg, pi. 7, fig. 7. 

 Hystrichosphaera furcata (Ehrenberg) O. Wetzel 

 Hystrichosphaera ramosa (Ehrenberg) O. Wetzel 



Hystrichosphaera furcata (Ehr.) 

 Hystrichosphaera furcata (Ehr.) 

 Hystrichosphaera furcata (Ehr.) 

 Hystrichosphaera ramosa (Ehr.) 

 Hystrichosphaera ramosa (Ehr.) 

 Hystrichosphaera furcata (Ehr.) 

 Hystrichosphaera furcata (Ehr.) 

 Hystrichophaera ramosa (Ehr.) 

 Hystrichosphaera furcata (Ehr.) 

 Hystrichosphaera ramosa (Ehr.) 

 Hystrichosphaera furcata (Ehr.) 



136. 



144. 



Deflandre : 14, pi. 5, fig. 9 ; pi. 8, fig. 3. 

 Deflandre : 62, text-fig. 108. 

 Deflandre : 61, pi. n, figs. 1-3. 

 Deflandre : 64, pi. 11, figs. 5, 7. 

 Lejeune : 239, pi. 1, figs. 2-4 ; pi. 2, figs, 5-10. 

 Conrad, text-fig. 2, no. 1. 

 Deflandre : 22, text-fig. 1, no. 11. 

 Deflandre : 22, text-fig. 1, no. 13. 

 Deflandre, text-fig. 15. 

 Deflandre, text-fig. 17. 

 Cookson & Hughes : 45, pi. 9, figs. 1, 2. 



Diagnosis. A variety of H. ramosa possessing an ovoidal central body bearing 

 gonal and occasionally a small number of sutural processes. Gonal processes 

 triangular in cross-section, sutural processes taeniate. Distally the processes are 

 trifurcate or bifurcate often with bifid terminations, tapering to sub-conical in 

 shape and sometimes branched. Sutural crests between processes proximal. 

 Tabulation typical for genus. 



Fig. 8. Hystrichosphaera ramosa var. ramosa (Ehrenberg). 



lateral view. x c.700. 



The holotype, in 



