NOTES ON TASMANIAN HYDROZOA. | 309 
Port Phiilip and Griffith Point, Victoria (Bale); Scottburgh, 
Natal (Warren); Station 44, off Coogee, New South Wales, 
49 —50 fathoms (Ritchie). 
Genus HALICORNOPSIS, Bale. 
HALICORNOPSIS ELEGANS (Lamarck). 
Plumularia elegans, Lamarck, Hist. Nat. Anim. sans Vertebres, 
BESO, p. 129. 
Aglaophenia elegans, Lamouroux, Hist. Polyp. Cor. Flex., 1816, 
p. 169; zd., Lamouroux, Encyclop. Méth. Zooph., 1824, p. 16. 
Aglaophenia avicularis, Kirchenpauer, Abh. Nat. Ver. Hamburg, 
¥, £872) p..33, pls: 1 and:1i1, fig, 3. 
Halicornopsis avicularis, Bale, Journ. Micro. Soc. Vict., 1, 1881, 
p- 26, pl. xin, fig. 3; id., Bale, Cat. Austr. Hydroid Zoophytes, 
1884, p. 185, pl. x, figs. 1, 2, pl. xix, fig. 32; id., Bale, Trans. 
ametroc. Hoy.’ Soc. Vict., xx1, 1887, pp. 90,101; 2d, 
Marktanner-Turneretscher, Ann. K. K. Hofmus. Wien, v, 
1890, p. 279. 
Azygoplon rostratum, Allman, Rep. Sci. Results ‘Challenger ” 
Exped., Zool., vit, 1883, p. 54, pl. xix, figs. 1 —3. 
Halicornopsis elegans, Billard, Ann. Sci. Nat., Zool., (9), v, 1907, 
p. 323; zd, Billard, Comp. Rend., cxivi1, 1908, p. 940; id., 
Pilar, Aim, Sci. Nat., Zool,, (9), 1x, 1909, p. 329% '2d., 
Billard, [bid., (9), x1, 1910, p. 44; td., Ritchie, Mem. Austr. 
Mus ive O, Voll. S50, pl: Ixxxtx, fig; 1;" 7d, Bale; Bio- 
logical Results ‘‘Endeavour,” 1, 1, 1914, p. 56; 2d., Briggs, 
Rec. Austr. Mus., x, 10, 1914, p. 296. 
The colonies belonging to this species are mature, and 
bear well-developed gonangia, which spring from the bases 
of the hydrocladia at their junction with the stem. They 
are somewhat irregularly ovate bodies, thick-walled, with- 
out operculum or orifice, and are turned alternately to 
right and left, forming a row along the front of the stem. 
Here and there the gonangia have become detached leaving 
