1879.] Hydroid Zoophytes from the Indian Coasts and Seas. 99 
stolon. The pinne are alternate, and each carries on its upper surface 
a monoserial row of hydrothece, they are transversely annulated, both 
at their origins from the stem and immediately above the origin of each 
calycle. The hydrothece are free, elongated and tubular, annulated at 
their origins, and with the margin of the mouth even. 
Gonosome.— Unknown. 
Habitat.—Rocks between high and low water at Pigeon Island, and 
Konkan Coast on the west coast of India, and at Diamond Island off 
the Pegu Coast in Burmah. 
This very interesting form is certainly a campanularian, while its 
long tubular hydrothece would indicate Zfoéa as its proper genus, 
a genus, however, not very well defined. I have lately had several oppor- 
tunities of examining this zoophyte in a living condition; the polypites 
are supported on long attenuated peduncles, and have both dise and 
tentacles completely extruded from the hydrothece, into the cavities of 
which they are only partially retractile. Although apparently tolerably 
extended in its distribution, it is very far from being abundant anywhere. 
It seems to thrive best in those localities most exposed to heavy seas 
and the influence of the South West Monsoon. ‘This species and another 
belonging to the genus Zhimaria are the only. representatives of the 
Hydroid family I have met with during two seasons spent upon the coast 
of the Ratnagiri and Alibag Collectorates. 
HALICORNARIA SETOSA (nov. spec.) 
(Plate X.) 
Zoophyte.—Stiff, erect, solitary, and of a dark-brown colour. 
Trophosome.—Stem bipinnate, more or less irregularly and numer- 
ously branched, varying in height from one to five inches, rooted by an 
entangled mass of short fibrous filaments, and carrying closely set primary 
pinne. The main stem is made up of a fasciculus of three tubes, from 
the central one of which an alternate series of hydrotheca-bearing pinne 
arises, but the stems of the secondary pinnez, which are formed of a 
fasciculus of two tubes, are destitute of hydrothece, but carry along 
their entire length an alternate series of ultimate hydrotheca-bearing 
pinne. The ultimate pinne are thus borne not only on the primary 
pinne but also on the stem; they are closely set, alternate, of nearly 
equal length, and divided by joints into a series of internodes, each of 
which gives origin to a ealycle with its nematophores. The hydrothecw 
are deep, flask-shaped, deeply concave in front below the lip, and corre- 
spondingly convex behind ; the aperture is wide, and has the margin pro- 
vided with two large lateral teeth, and two smaller ones posteriorly. The 
