No. X. POLYZOA. 285 



Syn. Bugula murrayana, 'Brit. M. Cat.' p. 46, pi. lix., Smitt, 1. c. L867, 

 pp. 291 and 348, tab. xviii. figs. 19-27. 

 „ Avicella multispina, V. Ben. 



Hub. Franklin Pierce Bay, 79° 29' N., H. W. F. ; Hunde 

 or Hunes Islands, Davis Strait, Dr. Sutherland ; Holsteinborg 

 Harbour, Norman ; Iceland, Wallich (teste Hincks. ) ; Orkney, 

 Lieutenant Thomas; Shetland, E. Forbes; Dublin Coast, 

 W. McCalla. 



2 2?.'(var. ? ) fruticosa, Packard. 



Syn. ? Cellularia quadridentata, Loven, MS. 1834 {teste Smitt). 

 „ Bugula murrayana {forma quadridentata), Smitt, 1. c. pp. 292 and 



351, tab. xviii. tigs. 25-27. 

 „ Menipea fruticosa, Packard, ' List of Labrador Animals,' p. 9, pi. i. 



fig. 3. 

 „ Bugula murrayana (var. fruticosa), Hincks, I.e. p. 98; Norman, 



' Valorous Dredgings.' 



Hob. Franklin Pierce Bay, 79° 29' N., H.W.F. ; Labrador, 

 Packard. 



Fam. 3. Membraniporid^e. 

 Gen. 1. Membranipora. 



1. M. unicornis, Alder. 



Syn. M. unicornis, Alder, ' Oat. Zooph. North, and Durham,' p. 56, pi. 



viii. fig. 6. 

 „ M. lineata {fo?-ma unicornis, /3/3. stadium longius adultum), Smitt, 



1. c. pp. 365-399, pi. xx. figs. 30, 31. 

 „ ? Reptojlustrella americana, D'Orbigny. 



Hob. Lat. 82° 27' N., H. W. F.; Hamilton Inlet, Labrador, 

 15 fathoms, Wallich!; Spitsbergen, 6-50 fathoms, and 

 boreal and Arctic seas generally, Smitt ; Coasts of Northum- 

 berland and Durham, Aider. 



Fam. 4. Flustrid^e. 



Gen. 1. Flustra. 



1. Flustra serrulata, n. sp. 



Char. Zoarium constituted of narrow, ligulate, bifurcated 

 branches slightly expanded at the ends; zocecia ovoid or 



