﻿196 



PROCEEDINGS OP THE 



[April, 1857. 



base of the polyp was more distinct than I have ever seen it in any 

 but the medusa-bearing cells of Campanularia noliformis. Tentac- 

 ula numerous; the proboscidiform mouth was very large and prom- 

 inent. The annulations of the petiole few, large and spherical. 

 The medusa cells did not present any marked peculiarity, their 

 proportions were similar to those of L. gmuulata in Jonst. Brit. 

 Zooph. pi. 25 fig. &2. They were found only near the rootsof the 

 polypidom. ' 



Unfortunately the Medusas were only half developed, and I did 

 not succeed in observing their full development, hence it is not im- 

 possible that I may be yet able to unite this larval form with one 

 of the foregoing species. 



This Laomedea was found on Sea-weed near low water about 

 the middle of September. 



* * * Tentacular bulbs without lateral cirrki, but with re-entrant radix — lashes short 



and rather stiff. 



OBELIA. Peron. (1S09.) 



Syn. Clytia, (pars) Lamouroux. (1812?) 



Campanularia, (pars) Lamarck. (1813?) 

 Eucope, (pars) Gegenbaur. (1865.) 



The general form of the locomotive organ is not, as usual, cam- 

 panulate but truly discoid, or rather it has the form of a plate turned 

 up at the edges all round. The digestive trunk has somewhat 

 the form of that described in Phortis, being faintly constricted 

 before joining the disk. The labial appendages, four in number, 

 present however a distinction, which may prove constant in the 

 fact that they have their edges not frilled. The radiate tubes are 

 four, the chamber at their intersection small. The sexual organs 

 are placed nearly midway their length, but the tendency is to 

 have them nearer the margin than to the digestive trunk. They 

 are round or oval, not provided with a distinct sinus, and like 

 those of Epenthesis bulge downwards, so as to appear hanging in 

 the shallow cavity of the disk. The tentacula vary in number 

 but are always numerous, frequently over a hundred. They are 

 short and have a certain stiff appearance not observable in the 

 other genera here described. The pendent bulb is small and 

 simple, and there is a re-entrant radix to each tentaculum, passing 

 back into the disk, within the marginal cord. The marginal cap- 

 sules are eight in number, usually containing a single corpuscle 

 each. In some of the species, among which is the following, they 



