MONOGRAPH OF THE EXISTING CBINOIDS. 



267 



FIG. 3ns. 



FlQ. 309. 

 FIGS. 308-309. 308, DIAOKAM SHOWING THE RELATIVE SIZE AND FREQUENCY or THE ARMS AND CIRRI IN PENTAMETROCRINUS 



VARIANS; THE CIRRI ARE NUMEROUS, VERY LONG, AND BUT SLIGHTLY CURVED, AND SERVE TO FORM A CIRCULAR MAT BY 

 WHICH THE ANIMAL IS SUPPORTED ON SOFT OOZE. 309, DIAGRAM SHOWING THE RELATIVE SIZE AND FREQUENCY OF THE ARMS 

 AND CIRRI IN ASTEROMETRA MACROPODA; THE CIRRI ARE FEW, VERY LONG, STOUT, AND SPINOUS DORSALLY, ADAPTED FOR 

 CLINGING TO A VERY ROUGH HARD SURFACE. 



