395 
of Edinburgh^ Session 1864-65. 
various kinds ; and it gradually increased in density from the 
growth of its constituent structures, and probably from the shed- 
ding of mucus. 
The presence of the case distinguishes it from Peachia and Hal- 
campa ; from the former it is also separated by the fact of the ten- 
tacles being wholly retractile within the swollen disc. It seems 
most nearly allied to Edwardsia, though the case was much larger 
than any previously mentioned, and its tentacles were also blunter 
and shorter. 
Edwardsia Goodsiri, n. s. — Found with the foregoing; sheath 
less perfect. It constantly protruded a pale bladdery portion with 
minute suckers posteriorly, and was more lively and sensitive than 
the former. When fully contracted, it assumed the shape of a 
Roman jar, and measured less than Jth of an inch in length. 
Tentacles fifteen, translucent, longer than the diameter of the 
oral disc, and not tapering much. At the tip of each, under a low 
power is seen a slightly opaque whitish ring ; then the tentacle is 
perfectly transparent for a short distance. From the base, a white 
spear-head reaches more than half-way up, its centre, however, 
showing the transparent texture. 
Oral disc streaked with white and light brown ; mouth not 
observed to project. Column behind the tentacles pale. 
When fully extended, it measures about half an inch, the pos- 
terior pellucid portion forming nearly the half of this. The anterior 
part of the latter, however, is tinged of a light fawn colour from 
the viscera. 
3. Miscellaneous Observations on the Blood. By John 
Davy, M.D., F.K.SS. Bond. & Edin. &c. 
These observations are given in six sections. 
In the first, “ On the Action of Water on the Red Corpuscles of 
the Blood,” the results are stated of trials of different proportions 
of water on these corpuscles ; from which it would appear, that two 
of water to one of cruor of the blood of the common fowd, sufficed 
to change the form of the corpuscles, and to render them globular. 
Other changes are described, which were witnessed when water in 
great excess was used, — changes referred by the author to endos- 
