198 NATURAL HISTORY OP 



Hab. : Coast of England and Hebrides {Dr. Gh'oy), 

 Scotch coast {Ellis), Oban {Marshall), St. Andrews 

 {Mcintosh), Lamlash Bay {D. L.). Height 4—6 in. 



This species has been called the " Cock^s Comb/^ 

 the " Sea Pen," and the " Sea Feather.'' It is of 

 reddish colour, except the lower part of the stalk, which 

 is yellowish, and bent slightly near the point. The 

 colour is derived from the spicules contained. The 

 stalk is nearly one-half of the length of the zoophyte, 

 and is believed to be fixed in the mud at the bottom of 

 the sea. The polyps are " fused together so as to form 

 leaves,'' and number from 2 — 15 in each leaf, according 

 to its length. The number of leaves is 34 — 36 on each 

 side. The zooids are found on the ventral surface of 

 the rachis, and between the bases of the leaves. 



This species is very phosphorescent, hence its name. 

 The light has been found by Panceri to arise solely 

 from special phosphorescent organs — " cordoni lumi- 

 nosi " — placed one in each compartment of the body 

 cavity of the polyps and zooids, 



2. P. EUBEA, Ellis. 



Pennatula italica {E. and 8.), P. setacea {Esper), P. 

 granulosa {Lavik., M. Edw., Be Bl.), P. phosphorea 

 {Olivier, B. Ghiaje), Penna rubra {Bohadsch). 



Hab. : Bristol Channel {Gray). 



This species differs from the preceding in having 

 25 — 46 polyps in each row, placed alternately so as to 

 appear like two rows. Calyx processes usually three 

 or four 10 each polyp. 



3. P. PULCHELLA. 



Phosphorella pulchella {Gray). 



Hab, : Shetland {Laughin), Polperro {R. Q. C). 



This species has 20 broad leaves on each side. 



