MONOGRAPH OF THE EXISTING CRINOIDS. 



435 



874 



875 



878 



879 



880 



FIGS. 874-880. SIDE AND COVERING PLATES OF VARIOUS THALASSOMETRIDS (DRAWINGS BV AUTHOB). 874. 

 PARAMETRA GRANTLATA. 875. SAME. 876. SAME, THREE SACCULI SHOWN. 877. SAME, TWO SUPPLE- 

 MENTARY PLATES. 878. SAME, SIDE PLATS VIEWED FROM INTERIOR. 879. THALASSOMETRA VILLOSA. 

 880. SAME. 



