818 MR. E. T. BROWNE ON BRITISH MEDUSA. [XoV. 16, 



become connected with the genus Podocori/ne and then the correct 

 name can be assigned to them. I have tried to rear the medusw 

 budded from Fodocoryne carnea, hut have failed to keep them alive 

 long enough to witness any further development. The specimens of 

 P. carnea taken in the tow-net always had eight tentacles and 

 showed no signs whatever of possessing any reproductive organs, 

 so that they may be regarded as quite early stages. The earliest 

 stage taken of the medusa which I have called Cytceandra areolata 

 has sixteen tentacles, which correspond to the number of tentacles 

 possessed by the medusae liberated from Podocoryne areolata. At 

 present I have no reason for doubting that P. carnea and P. areolata 

 are two distinct species, and therefore expect to find two distinct 

 adult medusie, but have only seen one. 



I give the description of an early stage (Plate XLVIII. fig. 1) : — 

 Umbrella about 1 mm. in length and in width, with scattered 

 nematocysts upon the ex-umbrella. Manubrium about two-thirds 

 the length of the umbrella-cavity, and the mouth with four simple 

 oral tentacles terminating with a cluster of nematocysts. Sixteen 

 large tentacles (4 perradial, 4 interradial, and 8 adradial), with 

 brownish basal bulbs ; and four slender tentacles which are 

 evidently at an early stage of growth. 



I add the description of a late stage (Plate XLVIII. fig. 2) : — 

 Umbrella about 4 mm. in width and slightly less in length. 

 Compared with an early stage it shows a change in shape owing 

 to the increase in the mass of mesogloea above the umbrella-cavity. 

 The oral tentacles are bifurcated and have the usual terminal 

 clusters of nematocysts. The number of tentacles in the specimen 

 figured is 25, but 30 tentacles were counted in another specimen. 

 The basal bulbs of the tentacles are very conspicuous, of a I'ich 

 reddish-brown colour. 



I saw ova surrounding the stomach of a specimen of this 

 medusa taken in Valencia Harbour on 22nd April, 1895. The 

 specimen was about 5 mm. in diameter and possessed 24 tentacles. 



Lae sabellarum, Gosse. 



In my previous paper on British Medusae (P. Z. S. 1896, p. 468), 

 I showed that the medusa Willsia stellaia, Forbes, was the adult form 

 of the medusa libei'ated from the hydroid Lar sabellarum, Gosse, 

 and a description was given of the different stages in development. 

 In that paper I described wrongly the branching of the radial 

 canals in the adult, and was led into the error by having seen only one 

 specimen, which has since proved to be an abnormal one. I stated 

 that the third branch of the radial canal was an offshoot of the 

 second branch, but in most specimens the third branch comes off 

 from the first branch. The diagrams (1, 2, 3, 4, pp. 819, 820) 

 show the normal development of the radial canals. 



During my visit to Valencia in 1896, I was able to collect a large 

 number of specimens, especially of the later stages, and found 

 some remarkable variations in the branching of the radial canals. 

 Two of these are illustrated by diagrams (5, 6, p. 821). In other 



