~ 



3 I 



f " 

 II 



SYSTEMATIC CLASSIFICATION OK KrillXI. 



23] 



II 



II 



o 

 o 

 3 N 







3 -<" 



g 



I 



r 



I! 



Maccoya liurliiiKionctuM. 



'--.T 



inimourieiuw. 



()ligo|K>ru8 daiute. 



NS 



) 



Melonechinus gpringrri. 



Mrliilirrhinil.x iixliaiioilMB. 



\Go 



Mi'l rhinu.1 multiporua. 







gigantpua below 

 the heavy line, and Melon- 

 ochinus keeping! above the 

 heavy line. 



*>. co N> 



