MONOGRAPH OF THE EXISCTNG CKINOIDS. 



259 



Fig. 272. 



Flo. 273. 



Fias. 207-273.— 267, Ventral view of tue centrodorsvl of a sPEcniES of Ptilomeira hOlleri from Sydney, New South 

 Wales. 2a8, Ventral view of tue cestrodorsal of a specimen of Astebometra macropoda from southwestern 

 Japan. 209, Ventral view of the centrodorsal of a specimen of Stesometra quinquecostata from the Ki Islands 

 (AFTER p. H. Carpenter). 270, Ventral view of the centrodorsal of a specimen of Parametra orion from southern 

 J.vPAN. 271, Ventral view of the centrodorsal of a specimen of Ptilometra mOlleri from Australia (after P. 11. 

 Carpenter). 272, Ventral view of the centrodorsal of a specimen of Thalassometra villosa from the western 

 Aleutian Islands. 273, Ventral view of the centeodors.vl of a specimen of Stylometra spinifera from Cuba. 



