78 G Canadian Arctic Expedition, 1913-1918 





PLATE XV. 



Fig. 1. Drifa glomeraia Ver. A group of spicules (a-u) from the ccenenchyma of a branch from a large 

 Hudson bay specimen, much enlarged. Leitz No. 6. 



Fig. 2. The same. A group of spicules from the anthocodia; a-g, some of the larger and rougher forms of 

 clubs; h, a spinulose spindle; much enlarged. 



Fig. 3. Drifa flavescens Dan. = ZX glomerate Ver. Spicules from the type, after Danielssen; a, b, club 

 and spindle from the anthocodia; c, d, club and spindle from the lower part of a polyp; e, f, 

 double star and double spindle or girdled spindle from the coenenchyma of the stalk; much 

 enlarged. 



Fig. 4. The same. Transverse section of a polyp containing eggs and planulae, after Danielssen. Enlarged. 



Fig. 5. The same. One of the planulae much enlarged, after Danielssen. The planulae even in this early 

 stage are filled with small fusiform spicules. 



Fig. 6. Duva rosea Dan. Type. A terminal branch, after Danielssen. Enlarged about 2. 



Fig. 6a. The same. Spicules from the anthoocdia; (a) slender; (b) stouter warted spindles. After Daniels- 

 sen; (6b) the same. Spicules from the branches much enlarged. 



Fig. 7. Duva multiflora Ver. One of the calicles much enlarged, By the author. 



