28 DEVELOPMENT OF 



head, from a slender peduncle, and its motions were vigo- 

 rous during its contraction and extension, by which the 

 water was as it were pumped in and out, and at the same 

 time the annular membrane surrounding the mouth was 

 alternately drawn in and pushed out. After being 

 observed for a longer or shorter time, the fully-formed 

 and lively campanulate bodies became detached, and 

 swam about in the water as free Medusa-like creatures ; 

 and they lived thus for several hours in the sea water in 

 which they were kept ; a few surviving to the end of the 

 day. Nevertheless I do not entertain the least doubt of 

 this separation being quite natural, and that it takes place 

 when the animal is in its natural condition at the bottom 

 of the sea ; partly for the reason, that they did not appear 

 to suffer in consequence of their being detached, since 

 after becoming so, thek motions were more lively than 

 before, and those which were not detached from the polype 

 ceased to move after the lapse of the same time as the 

 others ; and partly because in the same places whence I 

 had previously obtained specimens of my Corynefritil- 

 laria from the bottom (viz. below Oerfarsey, an island in 

 the bay immediately off the town of Reikewig,) I met 

 with a Medusa-like animal near the surface of the water, 

 which I considered to be a full-grown, free, bell-shaped 

 Coryne precisely of the same species (figs. 43, 44, 45.) 

 These individuals so exactly corresponded, both in their 

 external form and internal configuration with those 

 animals, except in size, that I can adduce as the only 

 difference, the presence of a lobate organ attached to the 

 longest angle. This organ, which in the campanulate 

 body of the Coryne, is represented by a wart-like protube- 

 rance, in these presented at its broader base, two lateral 

 lobes, and at its more slender extremity one smaller lobe, 

 which appeared to be cut off. It was at the same time 

 filled with cells or globules, and two very long marginal 

 filaments sprung from its base, which under a high 

 power appeared to be beset with minute vesicles arranged 

 nearly circularly. 



