78 G Canadian Arctic Expedition, 191 3-1 918 



Plxte XV. 



Fig. 1. Drifa glomcrala Ver. A group of spicules (a-u) from the ca-nenchyma 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. ?>. Drifa ftavescens Dan. = D. glomcrala 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 doul>ie spindle or girdled spindle from the coenenchyma of the stalk; much 

 enlarged. 



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



Fig. 5. The same. C)ne of the planulie much enlarged, after Danielssen. The planulte even in this early 

 stage are filled with small fusiform spicules. 



Fig. 0. Duva rosea Dan. Type. A terminal branch, after Danielssen. Enlarged about 2. 



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

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



Fig. 7. Duca inuH'iftora A'er. One (A the cali'^les much enlarged. By thr author. 



