54 G Canadian Arctic Expedition, 1918-1918 



PUTE III. 



Fig. 1. Siylatula Columbiana Verrill. New species. Type. One of the wings or pinnae from near the 

 distal end, with a reduced number of polyps, some of which are nearly expanded, x about 10 



Fig. 2. The same. Basal part of w'ing, more enlarged to show arrangement of the spicules on stalk and 

 base of wing. x 20. 



Fig. 3. The same. One of the larger wings from the central part wath the polyps partly contracted, some 

 of the crowded polyps are omitted. x 10. 



Fig. 4. The same. Four of the mature polyps from one of the larger wings, nearly expanded. x 20. 



Fig. 4a. Some of the supporting spicules of the same. e. Transverse sections of some of these 

 spicules. X 45. 



Fig. 5. Gersemia fruticosa (Sars.) Tip of a small branchlet, with a cluster of polyps partially expanded, in 

 alcohol. From Richmond gulf, Hudson bay. x 10 



Fig. 6. The same. Another polyp as compressed under the cover glass to show the arrangement of the 

 spicules. X 20 



Fig. 7. The same, a-o, A group of spicules from polyp-walls and tentacles; b-g, are slender spicules from 

 the larger or anthocodial portion; a, one of the largest spindles, probably from the collar- 

 like transverse rows; h-j, from the narrower proximal portion; k-o, mostly from the ten- 

 tacles; p-t, from the cortex of a branch. x 165 



Fig. 8. Gersewia canadensis YeriiW. Type. One of the nearly expanded tentacles. x about 45 



All by the author. 



