HVUKOihs — i;iv'i(i(is. 



45 



There are a few typical colonies of tliis form, the largest i-oacliing a 

 height of 17'5 cm. (jounsdiiie not pi'esent. 



Loc. — Thrown np on the sandy beacli of the lagoon, Lord Howe 

 Island. 



Distrihntiou. — Previously I'ecorded from Bass Strait (Busk, Allman, 

 Bale); Swan Island,' Banks Strait (Busk); Tasmania (Kii'chenpauer, 

 Briggs, Bale) ; Victoria (Kirchenpauer, Bale, Marktauner-Turneretscher) ; 

 South Australia (Bale) ; New South Wales (Bale, Ritchie). 



AOLAOPHENIA HOWENSIS, lirigtJS. 



Aglaopheiiia hotrt'iisiK, B]'iggs, see ante, p. 27, pi. v., fig. 1-2, pi. vi., fig. 1. 

 llalicornaria, sp. nov., Whitelegge in Etheridge, Mem. Austr. Mus., ii., 



1889, p. 41. 



An examination of Whitelegge's specimens listed as " Halicoruaria, 

 sp. nov.?" from Lord Howe Island shows them to be identical with 

 Ayhiopheiiia Jiuivensts, Briggs. 



Loc. — Middle Beach, Lord Howe Island. 



AgLAOPHENIA PARVUl.A, Bah. 



AciJao]}](enia jxtrvida, Bale, Journ. Micro. Soc. Vict., ii., 1882, p. 35, pi. 



xiv., fig. o, 3a, 3b. Id., Bale, Cat. Austr. Hydroid Zoophytes, 1884, 



p. 165, pi. xiv., fig. 3, pi. xvii., fig. 10. Id., Bale, Trans, and Proc. 



Roy. Soc. Vict., xxiii., 1887, p. 97. Id., Bale, Proc. Linn. Soc. N.S. 



Wales (2), iii., 1888, p. 790. Id., Marktanner-Turueretscher, Ann. 



K.K. Hofmus. Wien, v., 1890, p. 269. Id., Bale, Proc. Roy. Soc. 



Vict, (n.s.), vi., 1894, p. 105. Id., Vanhoffen, Deutsche Siidpolar 



Exped., Bd. xi., Zool. iii., Hydroiden, 1910, p. 335, fig. 47. 



On the surface of a sea- weed there occurred a hydrorhiza from which 

 sprung three monosiphouic, uubranched, simply pinnate colonies, the 

 largest 11 mm. in height. The minute characters agree in detail with 

 Bale's diagnosis and figures of a specimen from Queensclif¥, Victoria. 

 The colonies, however, are somewhat smaller than those originally 

 described. 



Dimensions. — 



Hydroclade-bearing internode, length ... ... U-17-0-22 mm. 



Hydroclade-bearing internode, diameter ... ... 013-0'14 mm. 



Hydroclade interuode, length 0-23-0-24 mm. 



Hydroclade internode, diameter ... ... ... 06-0 07 mm. 



Hydrotheca, depth 0-24-0-26 mm. 



Hydrotheca, breadth at mouth ... 0-lo-0-17 mm. 



Loc. — Growing on a sea-weed thrown up on tlie sandy beach of the 

 lagoon. Lord Howe Island. 



Biatrihution. — Previously recorded from Queenscliff ; Portland ; and 

 Port Phillip, Victoria (Bale) ; Port Jackson (Bale) and Kiama, New 

 South Wales (Marktanner-Turneretscher) ; St. Paul Island (Vanhoffen). 



Genus Thecocakpus, Nulling. 

 Thecocarpus brevirostris (Bask). 

 Plurmdaria hrevlrostris, Busk, Voy. "Rattlesnake," i., 1852, p. 397. 



