42 Proceedings of the Royal Physical Society. 
The occurrence of what had been named the ' Brick-clay 
Beds' overlying the true boulder clay were well known ; and 
in these brick-clays various fossil remains had been found ; 
their relation to the boulder-clay being probably, first the 
beds containing boreal shells, and next those with shells 
belonging to species still living in the neighbouring seas. 
To this last and latest class they were inclined to consider 
that the clay-beds with their recent fossils described by Mr 
Peach, most probably will be found to belong. 
II. Observations on British Zoophytes. By T. Strethill Wright, M.D. 
(Plate 1.) 
(1.) On a Supplementary Canal System in Stomobrachium octocostatuni . 
Stomohrachium octocostatum (Forbes) is occasionally found 
in the Firth of Forth, in the neighbourhood of Queensferry 
and Granton. All the specimens of the animal which I have 
taken have been females, and as Stomobrachium is one of 
those medus9D which feed and thrive well in captivity, I 
have repeatedly endeavoured to obtain young zoophytes 
from them in the hydroid stage of their existence, but 
hitherto without success, as the development of the ova in the 
ovarian bands invariably became arrested soon after the ani- 
mals were removed from^the sea. I have little doubt, how- 
ever, that the hydroid phase of Stomobrachium will event- 
ually be obtained, and that it will prove to be a Tubularian 
polyp allied to Atractylis or Clavula, inasmuch as its medu- 
soid form is destitute of otolithic sacs, organs which are 
always absent in the medusoids of Tubularian zoophytes. 
Several years ago I accidentally noticed a single minute 
yellowish polyp resembling Clavula, and having three rows 
of filiform tentacles, attached to a stone in a large tank, in 
which a specimen of Stomobrachium was confined with other 
zoophytes, but I was unable to trace any connection be- 
tween the polyp and the medusa, as the planuloid larvas of 
the latter were not ripe for extrusion, and never became so, 
although the medusa lived for many weeks.* 
* In observing the reproduction of a .naked-eyed Medusa, the greatest 
care must be taken that the water used in the experiment is perfectly free from 
tlie presence of planuloid larvae of other forms, which are frequently contained 
