:aC'I "THETIS SCIENTIFIC RESULTS. 



Plunndaria seiacea, Lamarck, Hist. uat. Animaux sans Vertfebres, 

 ii., 1816, p. 129. Id., Hincks, Hist. Biit. Hydroid Zoo- 

 phytes, 1868, p. 296, pi. Ixvi., fit;:. 1. Id., Bale, Proc. Linn. 

 Soc. N. S. Wales (2), iii., p. 778, pi. xx., figs. 14-18. Id., 

 Billard, Exp. Sci. " Travailleur " et "Talisman," viii., 1907, 

 p. 209. 

 , Plumidaria tripartila, voa Lendenfeld, Proc. Linn. Soc. N. S. 

 Wales, ix., 1885, p. 477, pi. xii., figs. 8-10. 

 A single broken stem of this widely-distributed species was 

 found entangled amongst Polyzoa. The example is notable for 

 its grace and delicacy, this being due to the extraordinary length 

 and relative slenderness especially of the stem-iuternodes, but 

 also of the hydrotheca-bearing hydroclade internodes. The 

 dimensions given below show that in these respects the Austra- 

 lian specimens even exceed that of the elongate variety obtained 

 by the " Tiavailleur " near the Strait of Gibraltar.** No 

 gonangia were present. 

 Dinif.nsiuns. — 



Stem internode, length O'52-l '03 mm. 



,, ,, diameter 0"08-0-13 ,, 



Hydroclade internode, hydrothecate, length 0"47-0-52 ,, 



,, ,, intermediate, ,, 031-0'32 ,, 



,, ,, ,, diameter ... 0'05 ,. 



Hydrotheca, depth C-08-0-10 „ 



,, diameter at mouth 0"10-0"12 ,, 



Locality. — Within Jervis Bay; depth, 10 to 11 fathoms; 

 bottom, seaweed and sand; 20th March, 1898. 



Plumidaria sefMcea has already been recorded from Australia 

 — Port Phillip, Victoria (von Lendenfeld), Port Phillip Heads 

 .(Bale). 



PLUMULARIA SULCATA, Lamarck. 



(Pldte Ixxxiv., fig. 3; Plate Ixxxix., fig. 5.) 



Plumidaria sulcata, Lamarck, Histoire nat. Animaux sans "Ver- 

 tebres, ii., 1816, p. 128. Id., Billard, Ann. Sci. Nat. Zool. 

 (9), v., 1907, p. 321. 



Plumidaria aglaopheuoides. Bale, Cat. Austr. Hydroid Zoophytes, 

 1884, p. 126, pi. x., fig. 6. 



Station 48. 



A solitary but magnificent colony represents the rare species 

 excellently described by Bale in 1884, from a fragment two 



^i Billard— 1907, p. 2i0. 



