44 RECORDS OK THE AUSTRALIAN MUSEUM. 



HaUconuiri(( ascidiuides, Bale, Cat. Austr. Hydroid Zoophytes, 1884, p. 

 176, pi. xiii., fig. 2, pi. xvi., tig. 1. Id., Bale, Proc. Roy. Soc. Vict, 

 (n.s.), vi., 1894, p. 106, pi. v., fig. 1. 



A number of tinbi'auched, simply pinnate colonies were found 

 together with a large branched specimen, 10*5 cm. in height, with hmg 

 hydrorhizal tubes at the base. The specimens are mature and bear well- 

 developed gonangia, which spring from the bases of the hydrocladia. The 

 characters agree in detail with Bale's descriptions except that the colonies 

 are much largei- than the Victorian specimens, which usually attain a 

 height of about two inches (5 cm.). 



Hydroclade-bearing internode, length ... ... 0-i7-0--i9 mm. 



Hydroclade-beariiig internode, diameter ... ... 0'4.0-0 -42 mm. 



Hydroclade internode, length ... ... ... ... 0'24-0-28 mm. 



Hydi'oclade internode, diameter ... ... ... 0'17-0'21 mm. 



Hydrotheca, depth ... ... ... ... ... Oly-0-21 mm. 



Hydrotheca, breadth at inouth (lateral aspect) ... 0" 14-0 -15 mm. 



Hydrotheca, length free portion mesial sarcotheca 22-0'24 mm. 



Gonangium, length ... ... ... ... ... 0-y5-l"13 mm. 



Gonangium, maximum width ... ... ... ... 0'40-0-54 mm. 



hoc. — Thrown up on the sandy beach of the lagoon. Lord Howe 

 Island. 



Distrihation. — Previously recorded from Queenscliff and Port Phillip 

 Bay, Victoria (Bale). Whitelegge^*' has recorded the occurrence of this 

 species at Maroubra Bay and Coogee Bay, New South Wales. 



Halicornakia prolifera (Bale). 



Aijlaophein'a prolifera, Bale, Journ. Micro. Soc. Vict., ii., 1882, p. 34, pi. 



xiv., fig. 5. 

 HalicoriKiria prolifera, Bale, Cat. Austr. Hydroid Zoophytes, 1884, p. 



188, pi. xiv., fig. 1, pi. xvi., fig. 10. Id., Ritchie, Mem. Austr. Mus., 



iv., 16, 1911, p. 858, pi. Ixxxv., fig. 2, 3. 



A number of branching specimens, 11 cm. in height, are chai"acterised 

 by the shortness of their mesial sarcothecae, which are considerably 

 abbreviated reaching only to the level of the anterior hydrothecal tooth. 

 In this character the specimens agree with those originally described and 

 figured (pi. xiv., fig. 5) by Bale (1882) from QueensclifP, Victoria, although 

 later (1884) he showed that in robust and well-developed specimens, the 

 mesial sarcothecae are much longer and curved gracefully forwards. 



Loc. — Thrown up on the sandy beach of the lagoon. Lord Howe 

 Island. 



Distrihiitioii. — Previously recorded from Queenscliff, Victoria (Bale) ; 

 Southern coast of New South AVales (Ritcliie). 



Genus AcLAOi'iiENiA, LanwitroN.v. 

 Aglaoi'henia divaricata (Busk). 

 Aglanpheuia divaricata. Bale, Biol. Res. "Endeavour," iii., 5, 1915, p. 

 309 (synonymy). 



'« Whitelegge— Proc. Koy. Soc. N.S.Wales, xxiii.. 188lt. p. 194. 



