56 G 



Canadian Arctic Expedition, 1913-1918 



PLATE IV. 



Fig. 1. Gersemia carnea (Ag.) Ver. A young specimen nearly fully expanded, copied from a photograph 

 of a living specimen in aquarium, o o, eggs. x about 2. 



Fig. 2. The same. Spicules from a specimen taken at Eastport, Me. a-^e, from the anthocodiae and 

 tentacles; f, a group from the anthocodia; g-h, double stars; i, j, k, double heads from the 

 coenenchyma of the cortex; 1, I 1 , spindles; m, n, popped-corn-shaped from the cortex; t, u, 

 small double heads. x 140. 



Fig. 3. The same: variety microstella Verrill. a, b, c, from the anthocodia and tentacles; d n, from 

 the cortex; d, e, f, double heads; g, h, I 1 , double stars; i-1, stellate forms seen endwise; 

 m, n, very irregular branched spicules. x 140. 



Figs. 4 and 5. Primnoa reseda (Pallas). Ver. Larger and smaller branches (from the Banks); a, b, young 

 calicles; c, a mature calicle of the larger kind; d, one of the shorter kind. x 2. 



Fig. 6. The same: side view of one of the shorter mature calicles showing the forms and arrangement 

 of the scales. Much enlarged. 



Fig. 7. Duva arborescens Dan. Spicules, after Danielssen: a d, from the polyp-bodies; e j, spicuies 

 from the branchlets; k, spicules from upper part of a branch; 1, m, spicules from a branch; 

 n, spicules from the base. 



Fig. 8. Gersemia longiflora Verrill. 'Variety? Spicules 'mostly from the anthocodiae and tentacles of a 

 specimen from the gulf of St. Lawrence, a, b, c, Slender rod-like bodies, sparingly warted 

 or spinulose, from the anthocodiae; d h, Stouter rods, or oblong forms from the anthoco- 

 diae; i, an irregular rough spindle; j n, imperfect double spindles blunt at ends; 1 q, small 

 forms mostly from the tentacles. Forms like a-f predominate and many are more slender 

 than those figured. x 110. 



