BaLe.—Hydroids from the New Zealand Coast. 265 
Loc.—Cape Maria van Diemen, ten miles north-west, 50 fathoms 
(Chilton). 
This species is referred to Halicornaria on account of the monosiphonic 
habit, the presence of a cauline sarcotheca at back of each axil, and the 
little points bordering hydropore—all special characteristics which I have 
not found combined in any species known to belong to other genera. 
Fic. 18.— Halicornaria rostrata n. вр. x 80. 
The peculiar character of the prolongation of front of hydrotheca into 
ros 
P. huttoni and P. incisa, figured by Coughtrey. The former is a poly- 
siphonic species, but P. incisa is monosiphonic, and may quite possibly be 
identical with the present species. 
LITERATURE CITED. 
ALLMAN, G. J., 1871. A Monograph of the Gymnoblastic or Tubularian Hydroids. 
—— 1876. Diagnoses of New Genera and Species of Hydroida, Jour. Linn. Soc., 
—— 1883. Report on the Hydroida, I, The Plumularidae, Rep. Sci. Results “ Chal- 
lenger " E , Zool., vii. 
—— 1885. Descri ription of Australian , Cape, and other y verd mostly new, from 
the Collection of Miss H. Gatty, Jour. Linn. Soc., Zool., 
——— 1888. pes 7 on the Hydroida, II, Rep. Sci. Results ‘ * Challenger ” Exped., 
Zool., 
Barr, W. M, 1881. On the Hydroida of South-eastern Australia, with Descriptions of 
Su pposed New Species, and Notes on the Genus Aglaophenia, Jour. Micr. Soc. 
Vict 
—— 1884. Colle of the Australian Hydroid Zoophytes 
——— 1886. The Genera of the Plumulariidae, with Observations on various Australian 
Hydroids, Trans. and Proc. Roy. Soc. Vict., xx 
