No. X. POLYZOA. 285 



Syn. Buffula murrayana, ' Brit. M. Cat.' p. 46, pi. lix., Smitt, 1. c. 1867, 



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

 Avicella multispina, V. Ben. 



Hob. 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 B. (var. ?)fruticosa, Packard. 



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

 Buyuda murrayana (forma quadridentatci), Smitt, 1. c. pp. 292 and 



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

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



fig. 3. 

 Bugula murrayana (v&r.fruticosa), Hincks, 1. c. p. 98; Norman, 



4 Valorous Dredgings.' 



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

 Packard. 



Fam. 3. MEMBRANIPORIDJE. 

 Gen. 1. Membranipora. 



1. M. unicomis, Alder. 



Syn. M. unicornis, Alder, ' Oat. Zooph. North, and Durham,' p. 66, pi. 



viii. fig. 6. 

 M. lineata (forma unicornis, j3/3. stadium longius adidtuni), Smitt, 



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

 ? Reptoflu&trella americana, D'Orbigny. 



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

 15 fathoms, Wallich!; Spitsbergen, 650 fathoms, and 

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

 berland and Durham, Alder. 



Fam. 4. FLUSTRID^E. 



Gren. 1. Flustra. 

 1. Flustra serrulata, n. sp. 



Char. Zoarium constituted of narrow, ligulate, bifurcated 

 branches slightly expanded at the ends; zocecia ovoid or 



