104 Memoirs of the Indian Museum. [Voi,. V, 



and Indian Oceans to the Antarctic. Living at temperatures of 27 ° to i°C, and in 

 depths ranging from 1,500 fathoms to the surface." 



A single small specimen was taken in a tow-net on the surface of the outer 

 channel of the Chilka Lake near Barhampur Id. on March 14th, 1914. The salinity 

 of the water at the time was practically identical with that of the Bay of Bengal 

 outside the bar. The medusa must be regarded merely as a casual and perhaps 

 involuntary visitor to the lake. 



Order SIPHONOPHOEA. 



Family DIPHYIDAB. 



Genus Diphyes, Cuvier. 



Diphyes bojani (Chun). 



1911. Diphyes bojani, Bigelow, Mem. Mus. Zool. Harvard, XXXVIII, No. 2, 

 p. 251; pi. vii, figs. 2, 3; pi. viii, fig. 6; pi. ix, figs. 1, 2; pi. x, figs. 2, 

 3; pi- xi, fig. 5; pi. xii, fig. 1. 



The synonomy of this species is discussed by Bigelow in the paper cited. Our 

 specimens agree well with the figure of Diphyes gegenbauri published by Lens and 

 Van Riemsdijk in their report on the Siphonophora of the ' Siboga ' {Siboga-Exp. LX, 

 pi. vii, fig. 57), or in some cases with that of Doromosia pictoides {op. cit., pi. i, 

 fig. 1). The species is evidently a variable one and the shape of the anterior necto- 

 phore depends to some extent on the condition of preservation of specimens. 



In our collection from the Chilka Lake I have found anterior nectophores only. 



D. bojani is widely distributed in the Indo-Pacific Region. It is not a per- 

 manent inhabitant of the lake, but is to be found in considerable numbers in the 

 outer channel in the salt-water season. It was usually present in our tow-nettings 

 obtained there in March, 191 4. 



Order CALYPTOBLASTEA. 

 Family CAMPANULINIDAE. 

 Genus Campanulina, van Beneden. 

 1868. Campanulina, Hincks, Brit. Hydr. Zooph., p. 186. 



Campanulina ceylonensis (Browne). 

 1905. Irene ceylonensis , Browne, Rep. Ceylon Pearl Fish., p. 140, pi. iii, figs. 



9-11. 

 1905. Irene palkensis, id., ibid., p. 141, pi. iii, figs. 12-16. 

 1907. ,, ceylonensis, Annandale, Journ. As. Soc. Bengal (n. s.) Ill, p. 79, 



pi. ii, fig. 5. 

 1907. ,, ceylonensis, id., Reo. Ind. Mus. I, pp. 38, 142, fig. 2. 

 1910. Phortis palkensis -f Ph. ceylonensis, Mayer, Medusae of the World, p. 309. 



