Fig. 2'2. 



FAMILY IV. PENNATULID^. 



12. Pennatula,* Linnaeus. 

 Character. Polype-mass free^ plumous^ the shaft suhcylin- 

 dricalf nahedbeneath, pennated above ; piniue two-ranked^ spread- 

 ing, flattened^ and poly piferous along the upper margin. 



\. P. phosphorea, purplish-red, the base of the smooth stalk 

 pale ; rachis roughened with close set papilla and furrowed down 

 the middle ; pinnce close ; polype-cells uniserial, tubular, with 

 spinous apertures. Sir R. Sibbald. 



Vignette, Fig. 22. 



' Formed from Penna, a quill — which the species so remarkably resemble 

 that we may say in the words of Lamarck — " II semble, en effet, que la nature, 

 en formant ce corps animal compose, ait voulu copier la forme exterieure d'une 

 plume d'oiseau." — Anim. s. Vert. ii. 425. 



