29S RECORDS OF THE AUSTRALIAN MUSEUM. 



Botany Bay, New South Wales, 28-20 fathoms ; Station 4>^, 

 off VVolU)ii.c:oiio', New Sontli Wales, 55-56 fathoms (Ritchie) ; 

 Great Australian Bight, 40-100 fathoms (Bale). 



Genus Halicoknahia, Jiusl-. 



Halicoknaria furcata, ]lale, 



rar. inter.media. Utile. 



(Plate XXV., fig. 3.) 



H<iVu-i>niiirii( iiifprnietVni, Bale, Biological Results "P^ixlea voui'," 

 ii., 1, 1914, p. 53, pi. v., fig. 2, pi. vii., figs. 3, 4. (Not 

 Jlalirunutrin iiiteniit^dia, Billard, Les Hydroides de 1' 

 Expedition du Siboga, i., Plumulaiiidfp, 1913, p. 65, pi. 

 iv., fig. 37). 



JLilifunnifi'i fiirc(if'(, Bale, var. 1 iiti-ruiriVin, Bale, Biological 

 Results " Endeavour," ii., 1, 1914, Addendum, p. 1. 



Two monosiphonic, dichotomously branched colonies were 

 found associated vv-ith Aijhioiihenla fKsiuiiiiic", Bale. The 

 larger specimen attains a height of 11-5 cm., with a diameter 

 of 1'5 mm. at the base. 



] h ii/en-'fioii'i : — 



Hvdrochide-bciiring iiiternode, length ... 0-78-0-87 mm. 



Hydroclaile-bearing internode, diameter ... 0-56-0"66 mm. 



Hydroclade internode, length ... ... 0-40-0-42 mm. 



Hydroclade internode, diameter ... ... 0-29-0-30 mm. 



Hydrotheca, depth« ... ... ... 0-27-0-29 mm. 



Hydrotheca, breadth^ ... ... ... 0-19-0-21 mm. 



Hydrotheca, length of free portion of mesial 



sai'cotheca... .. .. ... 0-07-010 mm. 



llhtrihiirum. — Tliis variety has l)een recorded only from 

 Oyster Bay, Tasmania, 20 fathoms (Bale). 



Baleoi'iginally ranked this variety as a spe(;ies, the sti-uctural 

 details of which appeared to fall between II . fidr'it'i nwd II. 

 hailei/i. At the same time he pointed out tlmt it may luive to 

 be (/hissed ultimately as a variety of //. fiirr,it>i. In the 

 "Report on the Plumulaiiiche of the Siboga Expedition" 



" Measured from aptu'ture t«i base alun^ Idii-jt axis of liy<h-othecjv. 

 " At right an<;les to depth. 



