PLATE XXXIV * 



Alcyonium digitatum. See pages 145 — 147. 



FIG. 



1. The Polype as it appears when fully extruded and 



viewed through a magnifier. 



2. The Polype when about to develop itself, and about one- 



third protruded. 



3. A view of the oral disk after the animal has been killed 



by immersion in fresh water, and the piece placed 

 between two plates of glass. 



4. A view of the upper part of the body compressed be- 



tween plates of glass. 



5. A view of a transverse section of the Polype-mass, highly 



magnified, shewing the longitudinal canals cut across, 

 and the ova in them. 



6. A cell still more highly magnified to shew the develop- 



ment of the ova. 



7. The spicula. 



