84 G Canadian Arctic Expedition, 19 IS- 191 8 



PLATE XVIlA. 



Fig. 1. Gersemia rubiformis (Ehr.). From a photograph under water, of a large alcoholic 

 specimen, only partly contracted, from Grantley harbour, Port Clarence, Alaska, 

 station 20d, in 2-3 fathoms. About natural size. See page 6 G. 



Figs. 2 and 3. Drifa glomerata Verrill. Front and back views, photographed under water, from 

 the largest Hudson bay alcoholic specimen described. See page 46 G. All photo- 

 graphed by Professor Alexander Petrunkevitch. 



