tgto.}| J. RircHm: Hydrotds of the Indian Museum. 23 
which is situated at a greater distance from the base of the hydro- 
theca. 
Measurements of parts are placed, for the sake of comparison, 
alongside those of the variety recorded below. 
Locatity: Andamans, 1899: 60 fathoms. 
H. balei, var. fava, Nutting (?). 
(Piksiy. fie. 125i 
Nutting, C. C., 1905, p. 955, pl. xill, figs. 11, 12, as Halicornania 
flava. 
The remaining fragments of this species belong to colonies 
more robust in build, but with similar minute characters. Varia- 
tions in the number and prominence of the lateral lobes occur here 
also, the large lateral’ lobe being sometimes accompanied by a 
smaller. ‘The variety differs from the type however with regard 
to the compression of its hydrothece, for in the former they are so 
closely set that the lower part of the mesial sarcotheca of one 
depresses the upper margin of the hydrotheca immediately below it. 
I am unabhie to find characters sufficient to separate Professor 
Nutting’s Halicernaria flava from the compressed variety of H. balev, 
a species which, since he considered the chitinous projection within 
the mesial sarcotheca to be unique for the genus, Nutting had 
apparently overlooked. In our specimens, however, the stem nodes 
are irregular, bearing varying numbers of hydroclades, and in addi- 
tion to the two sarcothecx at the front of the base of each hydro- 
clade, a third is situated behind. 
Measurements. 
F. typica. V. flava. 
Stem, diameter .. s oP Ors mii 035 mm. 
Hydroclade internodes, leneth SSO SIee 022-0 24 
Hydrotheca, depth, base totopmost point 0°25 ,, O22 - 
- width, wing to wing POZO is OF eo. 
Locatity : Andamans, 1899; 60 fathoms. 
Distribution.—The pe has been recorded only from the 
Red Sea (Mark.-Turn.) ; from the Bay of Bengal (present record) 
and from the Hawaiian Tslands (Nutting, 1905}. 
Halicornaria gracilicauits (Jaderholm). 
Jaderholm, E., 1903, p. 290, pl. xiv, fiss. 3, 4; as Lytocarpus 
gracilicaulis. 
A graceful species represented by a few fragments protruding 
from asponge. Although in an early stage of development the stem 
is already fascicled, and bears a single branch. The unjointed 
basal portion of the branch, to which Jaderholm refers, was indis- 
tinguishable, for although a ‘Tength in our specimens is destitute of 
