135 
appearance found generally in the group. Close to the base the 
ectoderm becomes thicker, and the cavity of the tentacle here loses 
the appearance of being transversely divided by septa. 
At the inner side of the base of every second tentacle is situated a 
sessile “ lithocyst” ; and at the inner side of the base of every ten- 
tacle may be seen a transparent oval space, having the appearance 
of a vesicle. The lithocyst consists of a spherical capsule, with a 
spherical, highly refractile otolite. No pigment spots occur. 
A narrow velum extends round the margin of the umbrella. 
Exactly in the middle, between each pair of radiating canals, may 
often be witnessed an appearance like a bundle of delicate fibres, ex- 
tending from the base of the manubrium to the marginal canal, where 
it loses itself, by appearing to break up into its component fibres. I 
believe this appearance is due to mere folds in the inner surface 
of the umbrella.* 
Towards the end of October I again visited the locality where I 
had previously obtained the Laomedea in great abundance and per- 
fection, but found nothing but dead specimens, from which the gono- 
phores had all fallen. 
Campanularia Johnstoni, Alder. 
This species was dredged in September, loaded with gonophores, 
whose contents were in every instance medusae. 
The gonophores may be described as cask-shaped, or of the form 
of a regular oval, truncated at both extremities. They are corru- 
gated transversely, so as to present a series of regular rings. They 
are situated on the creeping stolon of the zoophyte, to which they 
are attached by a short peduncle. They consist of a blastostyle, with 
medusal buds and investing capsule, and never carried sporosacs. 
The medusa, on escaping from the gonophore, has a diameter of 
about r f o of an inch. The umbrella is very convex, embracing 
about two-thirds of a sphere. From the base of the manubrium 
four radiating canals extend to the margin of the umbrella, to unite 
with the circular canal, and at each point of union arises a tenta- 
cle. The tentacle commences with a wide base, which passes rather 
* me dusa of Laomedea dichotoma, as here described, is probably only the 
young state of Gegenbaur’s Eucope polystyla (Zeit. f. Wiss. Zool. Band. 8), a 
species which this naturalist informs us he has traced to the gonophores of one 
of the campanularidae. 
