OF THE NORTH-POLAR EXPEDITION. 233 



Fam. 2. Bicellariid2e, Busk. 

 Genus Bugula, Ohen. 



1. BuGULA MuKRAYANA, JollllSt. (sp.). 



Flustra Murrayana, Johnst., Sars, Danielssen, Packard. 



Flabellaria spiralis, Gray, Brit. Radiata, p. 106. 



Bugula Murrayana, Brit. M. Cat. p. 46, pi. 59; Smitt, I. c. 1867, 



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

 Avicella multispina, Van. Ben. 



Sab. Franklin- Pierce Bay, 79° 29' BT. lat. {R. W. F) ; Hunde 

 or Hune Island, Davis Strait {Br. Sutherland) • Holsteinborg Har- 

 bour {Norman) : Ireland {Wallich, teste HincJcs) ; Orkney {Bieut. 

 Thomas) ; Shetland {JE. Forbes) ; Dublin coast {W. McCalla). 



2. Bugula fruticosa, Packard (sp ). PI. XIII. fig. 1. 

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



Bugula Murrayana {forma quadridentata), Smitt, I. c. pp. 292 & 351, 

 tab. xviii. figs. 25-27. 



Menipea fruticosa, Packard, List of Labrador Animals, p. 9, pi. i. fig. 3. 



Bugula Murrayana, var. fruticosa, Hincks, I. c. p. 98; Norman, ' Valo- 

 rous ' Dredgings. 



Without expressing any positive opinion as to whether 

 Packard's form is to be regarded as specifically distinct from 

 J5. Murrayana, I am inclined to look upon it in that light *. 

 The much slenderer habit — the branches being very often biserial 

 — the usually total absence of marginal spines, or at most the 

 presence of not more than one on either side above, the com- 

 parative rarity, and in many specimens the entire absence, of avi- 

 cularia and their small size when existing, present to my mind a 

 set of characters quite sufficient to justify the distinction of the 

 more northern form from the typical B. Murrayana, which would 

 appear but rarely to enter the Arctic zone, or at any rate to 

 belong more properly to the temperate. 



However this may be, the more abundant of the two Bugulas 

 collected by Capt. Feilden agrees in all respects with Professor 

 Smitt's figures 23 and 24 ; more especially as I have scarcely 

 noticed any zocecium with more than two very slender spines, 

 though four are mentioned in Prof. Smitt' s description. 



* Since the above was in type I am more inclined to agree with those who 

 regard B. fruticosa as a variety of B. Murrayana. 



