812 " THETIS " SCIENTIFIC RESULTS. 



Halecium gracile, Bale, Proc. Linn. Soc. N.S. Wales, (2), iii., 18^58,' 

 p. 759, pi. xiv., figs. 1-3. Id., Bale, Proc. Roy. Soc. Vict, 

 (n.s.), vi., p. 99. Id., Jaderholm, Ark. for Zool. Stockholm, 

 i., 1903, p. 266, pi. 12, figs. 2, 3. 



Ilcdecium parvulum, Bale, Proc. Linn. Soc. N.S. Wales (2), iii.» 

 1888, p. 760, pi. xiv., figs. 4, 5. Marktanner-Turneretscher, 

 Ann. K.K. Hof-mus. Wien, v., 1890, p. 218, pi. iii., fig. 22- 



Station 44. 

 To this species I refer, with some hesitation, a very frag- 

 mentary specimen, without gonosome. The stem is weakly 

 fascicled at the base, and the hydrothecse resemble those in tlie 

 figure by Allman, rather than those in that by Bale, although 

 rarely an example with much everted margin occurs. The hydro- 

 thecte, however, lie more closely to the stem than do those in 

 Allinan's figure. The size of the hydrothecse and their rapid 

 widening from base to margin are notable. 



Dimensions. — 



Stem internode, length 0'61-0-77 mm. 



„ „ diameter 0-19-0"24 „ 



Hydrotheca, depth 006-007 „ 



„ diameter at mouth... 0*17-0"18 ,, 



„ „ base ... 0-12-014 „ 



Locality. — Entangled amongst Polyzoa from Station 44, off 

 Coogee, five to six miles from shore ; depth, 49 to 50 fathoms ; 

 bottom, fine sand; 15th March, 1898. 



HALECIUM SESSILE, Norman. 



(Plate Ixxxvii., figs. 8, 9.) 



Halecium, sessile, Norman, Rep. Brit. Assoc. Adv. Sci. for 1866, 

 p. 196. Id., Hincks, Hist. Brit. Hydroid Zoophytes, 1868, 

 p. 229, pi. xliv., fig. 2. Id., Billard, Ann. Sci. Nat., Zool., 

 (8), XX., 1904, p. 157, pi. iii., figs. 8 and 9, pi. vi. Id., 

 Jaderholm, Kungl. Svenska Vetens-Akad. Handl., xiv., 

 1909, p. 58. 



IHalecium, robustum, Vanhofien, Deutsche Siidpolar Exp., 1901- 

 1903. xi., Zool. iii., p. 319, fig, 35. 



Station 54. 



A rare colony or two, apparently of this species, was found 

 springing from a stolon creeping upon a sandy worm-tube. The 

 Colonies are very minute, the largest being only 6 mm. high, in 

 this respect resembling the dwarf variety described by Billard 

 from La Hougue, which also grew upon the tubes of Sabellid 



