Plate V. 



Transverse sections through the body-wall, figs, i, 37 in the region of the oesophagus. Entoderm not 



drawn in figs. 3, 5, 6. 



Fig. i of Epizoanthus danielsseni (from Spitsb. Exp. St. 42) +/s * 



2 - norvegicus, capitnlar region (Trondhjem Fjord, Ostergren) 4/ 3 . 



3 - ( ) Vs- 



4 of Epizoanthus erdmanni (Lyngen, Nordgaard) t/ v 



5 - var. aurivilli (Finmarken, Goes & Malmgren) */,. 



6 - roseus 4/ 3 . 



7 - abyssorum 4/ 3 . 



i a. PI. in. 



