324 " ENDEAVOUR " SCIENTIFIC RESULTS 



All attempts to find a constant distinction between Hali- 

 cornaria and the allied genera, dependent on the trophosome 

 alone, have been failures. The monosiphonic habit is not 

 constant, and it is found in some Aglaophenice. I formerly 

 relied on the presence of sarcothecse behind the axils of the 

 hydrocladia, but I have recently found the same character in 

 several species of Aglaophenia and Thecocarpus. 



One character only is common to every Halicornaria which 

 I have examined, and to no other genus, the presence namely 

 of little perisarcal points on the margins of the hydropore, or 

 on one margin only. 



Halicornaria birostrata. Bale. 



Halicornaria birostrata, Bale, Biological Results " Endea- 

 vour, ii., 1, 1914, p. 49, pi. iv., fig. 5, pi. vii., fig. 6. 



Loc. — Great Australian Bight, 40-100 fathoms. 



Halicornaria veg^, Jdderholm. 



Halicornaria vegce, Bale, Biological Results " Endeavour," 

 ii., 4, 1914, p. 185, pi. xxxvi., figs. 4-5 (synonymy). 



Loc— Great Australian Bight, Long. 130° 40' E., 160 

 fathoms. 



Halicornaria tubulifera. Bale. 



Halicornaria tubulifera, Bale, Biological Results " Endea- 

 vour," ii., 4, 1914, p. 187, pi. xxxvi., fig. 3. 



Loc— Great Australian Bight, Long. 130° 40' E., 160 

 fathoms. 



Halicornaria superba, Bale. 



Aglaophenia superba, Bale, Journ. Micro. Soc. Vict., ii., 1881, 

 pp. 31, 45, pi. xiii., fig. 4-4b. 



Halicornaria superba. Bale, Cat. Austr. Hydr. Zooph., 

 1884, p. 175, pi. xiii., fig. 1, pi. xvi., fig. 4 ; Id., Bale, 

 Proc. Roy. Soc. Vict., (n.s.), vi., 1893, p. 107 ; Id., 

 Bale, Proc. Roy. Soc. Vict., (n.s.), xxvi., 1913, p. 145. 

 Id., Briggs, Proc. Roy. Soc. N.S. Wales, xlviii., 1915, 

 p. 312. 



A single specimen was observed, about nine inches in 

 iieight, with two or three branches near the summit. 



Locs.— 'Forty miles west of Kingston, South Australia, 30 

 iathoms. 



Twenty miles east of King Island, Bass Strait. 



