PLATE XXII. 



Fig. 310. Aiiciila stilplilirea, dorsal tentacle enlarged; from a drawing by 

 Dr. 8timi>son. 



Fig. 311. DeiMlroootus arborcscens, — from a drawing by B. F. Nutting, 

 — greatly enlarged. 



Fig. 312. The same, under surface of the head. 



Fig. 313. The same, dorsal tentacle. 



Fig. 314. Aiicula stilpliiirca ; from a drawing by Dr. Stimpson. 



Fig. 315. Wlolgula producta; from a drawing by Mr. Burkhardt. 



Fig. 316. The same. 



Fig. 317. Glandula mollis ; from a drawing by Mr. Burkhardt. 



