1g10.] J. Rrrenie: AHydvords of the Indian Museum. rz 
project from chitinous ridges stretching across the top of the cylin- 
der from the bases of the leaflets. 
Measurements. 
Tube of fascicle, diameter oe aon 0 240727, mim. 
Stem internode, length .. 7 aw OF 552 0:03) 45, 
ie diameter ee ert 7—- Ol EOos. 
Hydroclade internode, length .. 22 0:03-0:04. 3 
Hydrotheca, depth i se .« 0°390—0°43__,, 
2 diameter at mouth .. me FO125—O125: 75 
‘““ Corbula,’’ length is rs e 4 a 
s greatest diameter .. a O50), 4; 
Locauity : Andaman Islands ; depth 490 fathoms. Reg. No. 
64/7. 
Type in the Indian Museum, Calcutta. 
While the general aspect of this species approaches that of 
Thecocarpus, I have placed it in the genus Aglaophenia on account 
of the gonosome, the protecting portions of which form a structure 
resembling a complex, open corbula, from the bases of the leaflets 
of which hydrothece are absent. 
By the gonosome and by the shape and positions of the inter- 
nodal septa in the hydroclades, together with the shape of the hy- 
drotheca, this species may be distinguished from the other members 
of the genus. 
Lytocarpus annandalet,! Ritchie. 
(Pl. iv, figs. 8—ro.) 
Ritehe, J. 1909 (2), -p: 527: 
This species is formed for a single colony obtained at one of 
the deepest stations from which the ‘‘ Investigator ’’ obtained 
Hydroids. The colony, which is of a very dark brown colour, is 
unbranched, 63 mm. in height, with a rigid stem which is fascicled 
for its whole length, and is traversed by several pale constrictions 
slanting from behind downwards and forwards—such as occur 
in the species of Thecocarpus. Only the anterior tube, which does 
not possess nodes, bears hydroclades. ‘These rest upon a short 
process from the stem, are close-set (separated by 0°5 mm.), alter- 
nate, and are divided into regular thecate internodes. 
The hydrothece are closely approximated, deep, and rudely 
ovate in outline. Their aperture faces upwards and outwards, at 
an angle of about 45° with the stem ; their profile is convex in the 
lower half, concave in the upper, while their margin bears a single 
prominent anterior tooth, and on each side four sinuations, of which 
1 I have pleasure in naming this species after Dr. Nelson Annandale, 
Superintendent of the Indian Museum, whose enthusiasm has done much for the 
advancement of our knowledge of the Invertebrate Zoology of India. 
