MESOZOIC AND CAINOZOIC DINOFLAGELLATE CYSTS 



Membranilarnacia reticulata sp. 



PI. 24, figs. 4-6 ; Text-fig. 59 



nov. 



Derivation of name. Latin, reticulatus, net-like, netted. 



Diagnosis. Ellipsoidal central body with intratabular processes, one per plate. 

 Processes indicating a tabulation of 1-4', 6", 4c, 5'", 1"". Cingular processes some- 

 times absent. Sulcal processes and posterior intercalary process present on some 

 individuals. Processes cylindrical, solid, fibrous, united distally by a fine reticulate 

 membrane totally or partially enclosing central body. Processes rarely exceeding 

 20[x in length. 



Fig. 59. Membranilarnacia reticulata sp. nov. a, Lower (ventral) surface, seen through 

 the upper. Only part of the distal network uniting the processes is shown, b, Upper 

 (dorsal) surface of same specimen, c, Lower (antapical) surface, seen through the upper. 

 d, Upper (apical) surface of same specimen. Archaeopyle shaded, sulcal notch lies 

 between plates 1" and 6". 



