PLATE XXII 



Fig. 310. Ancula Slilplilirca, dorsal tentacle enlarged; from a drawing by 

 Dr. Stimpson. 



Fig. 311. Denclronotus arborescens, — 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. Ancula siilpliurea ; from a drawing by Dr. Stimpson. 



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



Fig. 316. The same. 



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



