EXPLANATION OF PLATE VL 

 (Figures 2-7. i8-ig cnntrilmlcd liy Dr. W. B. Clark: figures 8-17 after Clark.) 



RhIZOCRIKUS CYLINDRICUS U. Sp p. 275 



I. Lateral view of a complete body, (x2). 

 2-7. Views from various sides of several column joints, probably 

 belonging tn tliis species, (enlarged). 



I 'liiCi'iitiricii liiiicsand; I'iiiccutown, (154). 



Pextacrinus brvani Gabb p. 276 



8. End view of a detacbed column joint. 



9. Lateral view of a portion of tbe column. 



Vincci}tiiicii hmcsaiiJ : J'iiicciitoicn. 



GoXtASTER MAMMU.AT.\ Gabb p. 277 



10-16. Views from various sides of four different plates, (x2). 

 17. Surface of plate greath' magnified. 



I'iiicciitowii liiticsand : I'iiicciitoicii. 



PentacEROs ASPERlXrs Clark n. sp p. 278 



l8-ig. tapper and side ^■iews of a plate, (enlarged). 

 l'iiicriit"Z^'ii Iniu'samI : liiu-ciitozoi. 



892 



