22 Records of the Indian Museum. [VOR AV; 
Measurements. 
Hydrocladial internode, length ies 0°25 mm. 
Hydrotheca, diameter at mouth! .. Ole. 
Median nematophores, length os LOFTS 0-18 F 
Locatity : Eight miles west of Interview Island, Andaman 
Islands ; depth 270—45 fathoms. 
Distribution.—An Indo-Pacific species, which has been recorded 
from (1) Northern Pacific Ocean (Japan; Mark.-Turn., 1890, 
Stechow, 1907 and 1909: Hawaiian Islands; Nutting, 1905) ; 
(2) China Sea (Amoy ; Mark.-Turn., /.c.) ; (3) East Coast of Austra- 
lia (Port Denison ; Bale, 1884) ; (4) North Coast of Australia (Port 
Darwin ; Bale, /.c.: Torres Strait; Busk, 1852, Kirkpatrick, 1890) ; 
(5) East Indies (? Singapore ; Kirchenpauer, 1872, as A glaophenia 
rostrata) ; (6) Indian Seas (Mark.-Turn., /.c.: Ceylon, 7—Io fms. ; 
Thornely, 1904: Andaman Islands, present record). 
Halicornaria bale: (Marktanner-Turneretscher). 
GRiv iv ieai2 evar.) 
Marktanner-Turneretscher, G., 1890, p. 272, pl. vii, figs. 19, 
20; as Aglaophenia baler. 
A very few fragmentary colonies of this species were found 
projecting from a sponge. One agrees closely with the original des- 
cription, but it is a fragment only 13 mm. in height, and from the 
delicacy of its structures appears to be a young specimen. Few 
differences, and these of no specific value in a genus where consider- 
able variation is the rule, distinguish our specimens from the Red 
Sea examples. Thus the median lobe of the hydrotheca is less long 
and less pointed, and occasionally a second indistinct lobe appears 
on the margin ; the median sarcotheca is somewhat longer, reaching 
clear of the edge of the hydrotheca; the hydrotheca is less markedly 
tilted forward ; and in our specimens the opening at the base of the 
hydrotheca, through which the ccenosare passed, is bordered by 
sharp chitinous spines, projecting into the hydrotheca cavity, which 
in profile give a pectinated appearance to the base of the cup. Prob- 
ably the basal pecten was overlooked by Marktanner-Turneret- 
scher, as it is difficult to be distinguished until the ccenosarc has been 
removed. ‘The upper margin of the intrathecal ridge, viewed from 
in front, is seen to be rudely pectinated. 
Although the gonosome is absent, the characters of the tropho- 
some warrant the transference of this species from Aglaophenia to 
the genus Halicornaria. It is closely related to H. Mans, Busk, 
1852, from which it is to be distinguished by the strong convexity 
of its median sarcotheca (apparently a constant character), by its 
deeper hydrotheca, and by the position of the intrathecal ridge 
1 Measured in the direction of the hydrocladia! axis. 
