ANATOMY OF ASTRANGIA. 17 
PLATE V. 
HISTOLOGY OF THE TENTACLE. 
Fig. 1.—Distal (free) end of a tentacle. 
a. Terminal cluster of nematocysts. b. Lateral clusters. 
Fig. 2.—The same showing the threads extended from the nematocysts in both terminal and 
lateral clusters. 
a, b. Terminal and lateral clusters of nematocysts. c. Extended threads. d. Superficial ciliated 
layer. e. Hypoblast. 
Fig. 3.—Distal cluster of nematocysts. 
Fig. 4.—A tentacle with discoidal tip. 
Fig. 5.—Abnormal tentacle. The tip is bifurcated and there are two termimal clusters of 
nematocysts. 
Fig. 6.—A tentacle with disk-shaped cluster of nematocysts. 
Fig. 7A cluster of nematocysts from an unknown region of the body. 
Figs. 8, 9.—I am unable to interpret these figures. 
