PLATE LXVIII. 



FIG. 



], 2. Alcyonidium gelatinosum, p. 358. Of the natural 

 size, representing two specimens, one of them nearly 

 simple, and the other very much lobulated. Two spe- 

 cimens cannot be found alike. 



3. A magnified view of the detached polype. The figure 



was made in the year 1833, and more correct ones have 

 been since published. 



4. Alcyonidium parasiticum, p. 363. Of the natural size, 



on Plumularia falcata. 



5. Appearance of its surface under the magnifier. 



