PLATE XXXI. 



Fig. 42. Dorsal vitnv of Peridinium mimdum, sp. nov. X 1120. 



Fig. 43. Ventral view of same. X 1120. 



Fig. 44. Lateral view of same. X 1120. 



Fig. 45. Diagrammatic outline of epithecal plates of same. X 1120. 



Fig. 46. Ventral view of Peridinium crassipes, sp. nov. X 736. 



Fig. 47. Postero-dorsal view of same. X 736. 



ABBKEVIATrONS. 



ap.pl. — apical plate. 

 int.pl. — intercalary plates. 

 pr.pl. — precingular plates. 



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