io8 Memoirs of the Indian Museum. [Voi,. V, 



what distorted. This has made it impossible to obtain a satisfactory profile figure, 

 but the medusa possesses several distinctive characters that can be illustrated in 

 detail even from our material. 



In outline the medusa resembles Ph. globosum (Mayer) 1 having abundant jelly 

 and an evenly curved bell. The manubrium, gonads and tentacle-bulbs are deep 

 flesh-colour. The bulbs are tinted with brown externally and there is a dark brown 

 cross on the base of the manubrium as seen from the exumbrellar surface. It is 

 composed of four pairs of parallel lines of equal length, one pair on the proximal 

 part of the roof of each radial canal. As a rule the four lines do not quite meet in 

 the centre. Specimens with fully developed gonads are about 6 mm. in diameter. 



The number of tentacles is variable and their arrangement irregular. In all the 

 specimens examined a considerable proportion of them are not fulty developed and 

 the number of perfected tentacles is often different in different quadrants of the 

 same individual. The radial tentacles are no longer than some of the others. The 

 number, as well as the arrangement, of the otocysts is also variable. Sometimes 

 two are situated close together, but more often several tentacles intervene. They 

 are very small and inconspicuous. 



The velum is narrow. 



The manubrium is relatively long and has four long deeply-fringed lobes. 



The gonads are narrowly spindle-shaped and about equidistant when young 

 from the margin of the bell and from the manubrium. When mature they occupy 

 more than half the length of the radial canals and approach the margin, also becom- 

 ing more band-like and somewhat contorted. 



Type.— No. Z.E.V. 6827/7, Ind. Mus. 



Distribution.— Taken in large numbers on the surface in the outer channel of 

 the Chilka Lake (Orissa) in salt water, March, 1914. 



This species is apparently related to Ph. indescens, Maas, 1 from which it differs 

 in colour, in its much larger manubrial lips, and probably in other characters. Ph. 

 indescens has been found only in the Antarctic Ocean. 



Order GYMNOBLASTEA. 



Family HYDRACTINIIDAB. 



Genns Clavactinia, Thornely. 



Clavactinia gallensis, Thornely. 



1904. Clavactinia gallensis, Thornely, Rep. Ceylon Pearl Fish. II, p. in, pi. i, fig. 3. 



In sorting out our collection we found on several small shells colonies of a 

 minute Hydractiniid that agrees with Miss Thornely' s description sufficiently well. 

 The animal escaped our attention in the field. 



1 Oceania globosa, Mayer, Bull. Mus. Zool. Harvard, XXXVII, p. 51, pi. x, figs. 20, 20a (1900); 

 Phialidium globosum (in explanation of plate " globulosum ' " ') , id., Medusae of the World II, p. 272, pi. 

 xxiv, fig. 4. 



z Exp. Antarct. ' Belgica' , Medusen, p. 12, pi. i, fig. 6 (1906). 



