PLATE VII 



Fig. I. Echiurus antarcticus Spengd. Introvert. St. 190. ,< 1-5 nat. size. 



Fig. 2. Thalassema faex Selenka. St. 172. x2 nat. size. 



Fig. 3. Thalassema antarcHcum sp.nov. St. 1909. xrs nat. size. 



Fig. 4. l^halassetna antarcticumsp.now. St. 182. x 1-5 nat. size. 



