164 G Canadian Arctic Expedition, 1918-1918 



PLATE XXXI. 



Fig. 1. Edwardsiella sipunculoides (Stimpson). Side view of the upper part of the column 

 and bases of the tentacles, from life, x about 4. By the author. 



2. Pseudophellia arctica Verrill. Type. Side view, with part of the outer coat removed. 



Eggs and larvae show near the bass. By A. H. Verrill. 



3. Tealiopsis stella Verrill. Transverse section of a perfect mesentery from a Hudson 



bay specimen; m, longitudinal muscle; b, basal muscle; i, endoderm; p, outside 

 of stomodseum. By the author. 



4. Halcampa (?) anomala Verrill. New. Side view of the type, from life; x about 4; 



b, one of the branched tentacles more enlarged. By the author. 



5. UrtitinacrassicornisEhr. Transverse section of a tentacle; g, ectoderm; h, mesoglcea; 



i, endoderm; 1, muscle lamellae, after McMurrich. Much enlarged. 



6. Metridium dianthus (Ellis). From a photograph of a small living specimen. Some- 



what enlarged. 



