304 E. A. BRIGGS. 
PLUMULARIA BUSKII, Bale. 
Plumularia buski, Bale, Cat. Austr. Hydroid Zoophytes, 1884, 
p. 125, pl. x, fig. 3, pl. xix, figs. 34, 35; 2d., Bale, Trans. Roy. 
Soc. Vict., xx111, 1886, p. 94; id., Hartlaub, Zool. Jahrb. 
Syst., x1v, 1901, p. 374, pl. xxii, figs. 22, 32, 36; ad., Thornely, 
Rep. Ceylon Pearl Oyster Fisheries, pt. 2, Suppl. Rep., vu, 
Hydroidea, 1904, p. 120; zd., Ritchie, Proc. Zool. Soc., 1910, 
p. 832 ; ad., Bale, Biological Results “ Endeavour,” ii, 1, 1914, 
p. 28. 
Plumularia buski, Billard, Les Hydroides de | Expedition du 
Siboga, 1, Plumulariide, 1913, p. 21, pl. i, fig. 15. 
Plumularia nutting, Billard, Arch. Zool. Exp., (5), vii, 1911, 
p. Ixvi, fig. 8 
I have included in the synonymy of this species the 
Hydroid, which Hartlaub has recorded from Laysan under 
the name of P. buskii, Bale, although the minute sarcotheca 
immediately behind the hydrotheca is undoubtedly absent. 
With regard to the identity of Plumularia nuttingi, a 
further examination of the type specimen in the Siboga 
collection has convinced Billard that this species is iden- 
tical with P. buskii, Bale. 
A few well-preserved colonies, the largest 50 mm. in 
height, do not differ from others in the Australian Museum 
from St. Francis Island, South Australia, and from King 
Island, Bass Strait. 
Dimensions.— 
Stem internode, length ... att .. 0°70 — 0°73 mm. 
Stem internode, diameter sae .- O29 — 0°33 ,, 
Hydroclade, length sae BA up to 9 ,, 
Hydroclade, thecate internode, ian 0°57 — 0°61 ,, 
Hydrotheca, depth see we ope O20. ae 
Hydrotheca, diameter at mouth . 0°26 — O25 
Locality.—D’ Entrecasteaux Channel, Tasmania, 2—11 
fathoms. 
