io6 Memoirs of the Indian Museum. [Voi,. V, 



Family CAMPANUIyARIIDAE. 



Genus Obelia, Peron and L,esueur. 



Obelia spinulosa (Bale). 



1888. Campanularia (?) spinulosa, Bale, Proc. Linn. Soc. N. S. Wales (2) III, p. 



756, pi. xii, figs. 5-7. 

 1910. Campanularia (?) spinulosa, Ritchie, Rec. Ind. Mus. V, p. 5. 



A single specimen of this species was taken in the main area of the lake in July, 

 19 13. It grew on a piece of drift- weed stranded among rocks near Patsahanipur and 

 though many of the polyps were alive, was in a somewhat degenerate condition. 

 A few gonothecae were present but did not contain gonosomes. 



The information that the hydroid is an Obelia I owe to Prof. K. Ramunni 

 Menon of Madras, in whose laboratory the medusa has been reared. I have also to 

 thank him for the sketch reproduced (fig. 9) , which was made from life by his pupil 

 Mr. A. V. Narayananvami Ayer. 



Fig. 9.— Obelia spinulosa (Bale). 



0. spinulosa was originally described from N. S. Wales and has since been 

 recorded from Java and the Andamans. It is very common (with Clytia geniculata, 

 Thornely) in Madras harbour, in which it grows on the shells of mussels, etc. 



Genus Clytia, I/amouroux (Hincks). 



1868. Clytia, Hincks, Brit. Hydr. Zooph., p. 140 (Hydroid). 

 1910. ,, Mayer, Medusae of the World II, p. 261 (Medusa). 



Clytia serrulata (Bale). 



(Plate ix, figs. 1, la, lb.) 



1888. Campanularia (?) serrulata , Bale, Proc. Linn. Soc. N . S. Wales (2) III, 

 p. 257, pi. xii, fig. 4. 



So far as can be judged from well-advanced embryos in the gonothecae, this 

 species is a Clytia ; it is certainly neither a Campanularia nor a Gonothyraea. The 



