38 ARVID R. MOLANDER, ALCYONACEA. 
Type I. Bark spicules, short broad rollers, with two or more girdles; sometimes 
short rods with girdles, crosses, etc. of simple construction; spicules with few, but broad, 
thorns. (Fig. 11 a.) Length of spicules 0,10—0,15 mm. 
Fig. 11. Bark spicules. a) From Alcyonmium digitatum Linné. 
ce) Spicules of inner coenenchym from A. digitatum TiNnnk. d From 4. digitatum var. norvegicum (Kor: and DAN), 
Spicules of anthocodia. e) From ÅA. diqgitatum LInnk. f) From AA. digitatum var. norvegicum (Kor. and DAN.) 
(11 a, b, c, e, f after Brock 1912 a). Enlarged 200 times. 
b) From 4. digitatum var. norvegicum (KOR. and DAN.) 
Spicules of inner coenenchym, long branches, sparsely thorned; rods and spindles. 
(Hig ITeN 
Spicules of anthocodia, spindles, clubs and rods of slender type. (Fig. 11 e.) Length 
of spicules 0,35 mm. 
Type II. Bark spicules, somewhat longer, not such broad rollers with fewer, more 
closely packed thorns; sometimes longer, more rod-shaped spicules, with girdles. (Fig. 
11 b.) Length of spicules 0,1,—0,2 mm. 
a My - 
