MONOGRAPH OF THE EXISTING CRINOIDS. 



245 



FIG. 227. 



Fio. 22S. 



FIGS. 227-22S. 227, LATERAL VIEW OF A SPECIMEN" IIF ATOPOCRINUS SIBOGi FROM THE EAST INDIES, SHOWING THE BASAL BATS, 

 TIIE GREATLY REDUCED EASALS, AND THE CONICAL CENTRODORSAL WITH STRONG INTERRADIAL AND RADIAL RinGES. 2-'S, 

 LATERAL VIEW OF THE CENTRODORSAL OF A SPECIMEN OF I'SATHYBOMETRA INUSITATA FROM NEAR THE I'OSTILLON ISLANDS, 

 SHOWTNQ THE CHANGE IN THE ARRANGEMENT OF THE CIRRUS SOCKETS FROM ALTERNATING RuWS TO 1'EKINITE SEGREGATED 



COLUMNS. 



