ii6 
ZOOLOGY OF THE FAR EAST 
and seem to be numerous. Each has the form of a bowl or trumpet containing a 
single concretion in its hollow. To elucidate their structure completely sections 
would be necessary. 
The nematocysts are almost spherical. They are from 7 to 9^ long and about 
6/u broad. 
Locality. Tidal creeks containing water of low but extremely variable salinity 
in the neighbourhood of Port Canning, Gangetic delta. Three specimens were taken 
by Mr. Stanley Kemp and myself in December 1916, one in a townet on the surface, 
the other two in a bottom-net. One of the latter was the only fully mature specimen 
seen (fig. 4, p. 114). 
Type-specimen No. ZEV. Zool. Survey of India. 
It seems to me by no means improbable that this medusa is the sexual genera- 
tion of Anniilella gemmata, Ritchie, but the only morphological evidence lies in the 
close resemblance of its nematocysts to the larger nematocysts of the hydroid. 
Family GERYONIDAE. 
Genus Liriope, Lesson. 
Liriope rosacea (Eschsch.). 
1897. Liriope rosacea, Maas, Mem. Mus. Zool. Harvard XXIII (i), pp. 25, 26, pi. iii, figs. 7-8. 
igio. Liriope rosacea Mayer, Medusae of the World II, pp. 416, 417, figs. 269, 270, 273, pi. iii, 
fig. I. 
Young medusae of this species were abundant in the channels of the outer lake 
of the Tale Sap in January, 1916. The oldest were not much more than 10 mm. in 
diameter, and were in the stage figured by Maas in 1897. Others were smaller and 
had the manubrium quite short, as in the immature stages of Liriope sp., figured by 
Mayer {op. cit., 1910, pi. i, figs, i and 2). 
These little medusae were carried in and out of the lake by the tide and prob- 
ably had been bred in the sea. They cannot be regarded as more than casual 
visitors to the lake- system. 
L. rosacea has a wide distribution in the littoral zone of the warmer seas. 
CTENOPHORA. 
Order CYDIPPIDEA. 
Family PLEUROBRACHIDAE. 
Genus Plcurobrachia, Flemming. 
Pleurobrachia globosa ceylonensis, Browne. 
1915. Pleurobrachia globosa var. ceylonensis, Browne in Herdman's Rep. Ceylon Pearl Fish. 
IV, p. 161. 
