PLATE VIII 



Fig. I. Hamingia arctica Koren and Danielssen. St. 1958. x 1-5 nat. size. 



Fig. 2. Phascolosoma anderssoni Theel. Varying appearance of the posterior end 

 of the body according to degree of inflation. 



Fig. 3. Phascolosoma 7nargaritaceum Sars. St. 1653. xi'5 nat. size. 



Fig. 4. Phascolosoma margaritaceum Sars. St. 1647. xi-5 nat. size. 



