Plate 57. 



Fig. I. CamJcidiui nilkhi, var. triloba. X 26. D5J91. a-c, three views. 



2. Cristellariu articulula (?) X 26. a, side view; b, apertural view. 



3. Cristellarid articulata (?). X 26, with broad cristellarian base. 



4. CrisleUaria articulata (1). X 46. 05110. Very elongate, irregular specimen. 



5. ChilosiomeUa (/raiidis. X 20. 05449. r;, front view; 6, side view; c, aper- 



tural view. 

 540 



