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is ultimately represented by a small irregular tubercle in the bottom 
of the sac. 
The germinal vesicle and spot are very distinct in the young ova, 
and the spermatozoa present the usual form of caudate corpuscles. 
The larva is a ciliated, leucophrydiform body. 
Laomedea Jiexuosa , Hincks. 
The usual conformation of the gonophores, and their contents, have 
been described in the former paper ; but there still remains to be 
considered a remarkable modification of the reproductive system in 
this species. 
We not unfrequently find, especially in specimens gathered late 
in the season, that on the summit of the capsule, and altogether 
external to its cavity, there are borne certain peculiar sporosacs, 
with a structure presenting some interesting points of difference 
from that of the ordinary or intra-capsular sporosacs. 
It was to these extra-capsular sporosacs as occurring in L. 
Jiexuosa ,* that Loven long ago called attention, when he supported 
and developed the doctrine just then announced by Ehrenberg, of 
the sexuality of polypes, a doctrine which, though in its mode of 
statement not absolutely correct, was nevertheless full of signi- 
ficance. 
The extra-capsular sporosacs, with their investing ectotheque, are 
attached by a short peduncle to the summit of the blastostyle, where 
the latter expands into a sort of operculum for the capsule. Two 
or three of them, in different stages of development, may generally 
be seen on a single capsule. They are nearly spherical bodies, and 
contain either a variable number of ova, or else a mass of sperma- 
tozoa, the generative elements in either case surrounding a central 
spadix. The ectotheque contains thread- cells, and there is developed 
from this membrane, upon the summit of the sporosac, a little crown 
of short cylindrical processes like rudimental tentacula. The whole 
body bears thus a resemblance, by no means remote, to a medusa with 
the opening of its umbrella contracted ; but I could never find in it 
* The species on which Loven’s observations were made is named by him 
Campanularia geniculata . His figures, however, are undoubtedly those of 
Laomedea flexuosa, whose distinctness from Campanularia (or Laomedea) geni- 
culata of Linnaeus has been fully proved by Dr Johnston, and from L. gelati- 
nosa of Pallas, with which Johnston confounded it, by Mr Hincks. 
