20 MARINE FAUNA 01 ST. INDREWS. 



growing on Cynthia groaaularia under the cavern-roofe ; but 



i! is not -si-i-ii on the littoral seaweeds, as is Glava squamata 

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

 of Scotland. The tentacles show a slightly enlarged sucker- 

 tip. 



Fam. 2. Hydracthuidae. 



Genus Hydkactinia, Van Beneden. 



Hydractinia echinata, Fleming ; Hincks, Brit. II. /• 



vol. i. p. 23. 



Abundant on Fusus islaudirus, Xntici, 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. Eudendriidse. 

 Genus Eudendeium, Ehrenberg. 



Eudendrium rameum, Pallas ; Hincks, Brit. II. 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 capiUare, Alder; Hincks, Brit. II. 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. Tubular iidae. 



Genus Tubulakia, Linnseus. 



Tubular ia indivisa, L. ; Hincks, Brit. II. Z. 

 vol. i. p. 1 1">. 



Common in deep water. One of the large specimens 



