20 MARINE FAUNA OF ST. ANDREWS. 



growing on Cynthia grossularia under the cavern-roofs ; but 

 it is not seen on the littoral seaweeds, as is Clava squamata 

 on the shores of the Hebrides and the western and other coasts 

 of Scotland. The tentacles show a sliglitly enlarged sucker- 

 tip. , 



Fam. 2. Hydractiniidse. 



Genus Hydractinia, Van Beneden. 



Hydractinia echinata, Fleming ; Hincks, Brit. H. Z. 

 vol. i. p. 23. 



Abundant on Fmus islandicus, Natica, and other univalve 

 shells cast on shore after storms. The outer lip in the shells 

 inhabited by hermit crabs is frequently prolonged into a horny 

 membrane, as mentioned by Dr. Johnston. 



Fam. 9. Eudeudriidae. 



Genus EUDENDRIUM, Ehrenberg. 



Eudendrium rameum, Pallas ; Hincks, Brit. H. Z. 

 vol. i. p. 80. 



Plentiful in the deep water of the bay, attached to shells and 

 masses of Balani and Serpulce. A fine specimen measured 

 9 inches high ; and the breadth of the branched portion was 

 8 inches. 



Eudendrium capillare, Alder; Hincks, Brit. H. Z. 

 vol. i. p. 84. 



Fine tufts are occasionally found on the stems of Anten- 

 nularia /amosa, interwoven with other zoophytes, from deep 

 water. The specimens had no short branches ; all were much 

 elongated, and the polyps terminal. Some slight rings exist 

 here and there on the main stems at the base ; those at the 

 origin of each branch are very distinct. 



Fam. 11. Tubulariidae. 



Genus TUBULAEIA, Linnseus. 



Tubularia indivisa, L. ; Hincks, Brit. H. Z. 

 vol. i. p. 115. 



Common in deep water. One of the large specimens 



