EXPLANATION TO PLATE XX. 



FIG. 1. Aijl,iu]il-ni,i itpn-tn Nutting. l':irt of liyo.roclao.inm (greatly enlarged V 



l'. Aijlauptmiia apcrtn. ('orl)iila (enlarged). 



3. Aglaophenia n-ixtifi;,ns Xuttiug. Part of hydrocladinm (greatly enlarged). 



I. .l//lanjiliiiiiii i-rixlifroiix. t'orlinla (enhirgedi. 



.'.. Aylanplifiiin roti>rtn Nutting. Part ol' hydrocladiiim (enlarnod). 



ii. .l</l<io}iln-nia coiilinin. Ilydrotlii-c.-r (greatly enlarged). 



7. .-Igliioplirniii rinilorta. Corlmla ( I'lilar.m'd i. 

 220 



