FIGURES 37, 38-A, and 38-B 



Fig. 37. Efiridinium crassipes Kofoid from station 99 (sample 590). A, apical view; 

 B, ventral view; C, antapical view; D, apical view of separated girdle plates; E, ventral view 

 of separated sulcal plates; F, ventral view of undissected sulcal complex; rabbet membranes 

 not shown; G, right lateral view. Magnification: x 340. Symbols: as, anterior sulcal plate; 

 gl-g4, first to fourth girdle plates; la, left accessory sulcal list; lal, left segment of apical 

 list; Is, left sulcal plate; p, flagellar pore; pas, posterior accessory sulcal plate; ps, poste- 

 rior sulcal plate; ral, right segment of apical list; ras, right accessory sulcal list; ris, 

 right internal sulcal plate; rl, right sulcal list; rll, right lateral list; rs, right sulcal plate. 



Fig. 38-A. Distribution of Peridinium crassipes and Peridinium pallidum at 

 Carnegie stations . 



Fig. 38-B. Distribution of Peridinium truncatum at Carnegie stations. 



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