30 MARINE FAUNA OF ST. ANDREWS. 



Genus Tiiuiakia, Fleming. 

 Thuiaria thuja, L. ; Hincks, Brit. H. Z. vol. i. p. 275. 



Common ; chiefly frequenting dead valves of Cyprina, 

 Pecten, and Tapes, as well as stones — shooting its long stems 

 upwards (occasionally to the length of 14 inches) amidst 

 masses of the tubes of Serpula, Thcbpus, and other Annelids, 

 anil patches oiAlcyonium. In some examples a short secondary 

 stem branches from the main trunk near the base. Parasitic 

 upon the stems are numerous other corallines, such as Dtphasia 

 rosacea, which clothes anew the bare zigzag trunk with a more 

 silky fringe than nature originally provided ; rough crusts of 

 Cellepora or the spreading Alcyonium aniAlcyon idium entirely 

 surround it ; while occasionally a long tunnel of Thcbpus is 

 glued from the base to the branching portion. Now and then 

 it occurs in the stomach of the cod. 



Fam. 9. Plumulariidae. 



Genus Antennularia, Lamarck. 



Antennularia antennina, L. ; Hincks, Brit. II. Z. vol. i. p. 280. 



From the deep water of the bay ; common, but less so than 

 the next species. Fine tufts reach a height of fully 11 inches. 

 In a curious example a number of simple straight stems pro- 

 ceed from the upper edge of a fragment of an old trunk. 



Antennularia ramosa, Lamarck ; Hincks, Brit. II. Z. 

 vol. i. p. 282. 



Common in deep water, whence it is usually brought by the 

 fishermen's lines. 



Genus Plumulaima, Lamarck. 



Plumularia pinnata, L. ; Hincks, Brit. II. Z. vol. i. 

 p. 295. 



Frequent in deep water, and often reaching the height of 

 7 inches. A tall variety is found in which no spines are present 



