84 REPORT—1846. 
Zoology of Lough Neagh, compared with that of the Lake of Geneva. 
By W. Tuompson ; the Insects by A. H. Haripay. 
The respective areas of Lough Neagh and the lake of Geneva, and their physical, 
&c. differences being first noticed, a comparison was given of as many portions of the 
subject as the published memoirs on the zoology of the Swiss lake afforded data on, 
including the birds, fishes, mollusca, and certain families of the insects. A brief no- 
tice of the Crustacea and Annelida of Lough Neagh, and some remarks on the botany 
of its shores and waters, concluded the paper. 
Notes on the Natural History of Corfu. By Captain Porriock, RB. 
On the Pulmograde Meduse of the British Seas. By Prof. E. Forses. 
At the Birmingham Meeting, in 1839, the author, in conjunction with Prof. Good- 
sir, brought forward a first essay towards an investigation of the British Acalephe, 
selecting the ciliograde species for illustration. Since that time he has yearly availed 
himself of every opportunity of pursuing the inquiry, but has abstained from publish- 
ing, hoping to gain more complete knowledge of a difficult and much-confused branch 
of zoology. Having now however examined more than twice the recorded number 
of British Meduse and become acquainted with numerous new specific and several 
new generic forms of great interest to the naturalist, he ventures to lay before the 
Section an outline of the data in his possession. These data are in great part due to 
the opportunities afforded him by his voyages round the coasts of Britain with his 
friend, Mr. M‘Andrew. After pointing out the difficulties attending the study of 
these animals, and giving a brief view of the present state of the subject generally, 
Prof. Forbes insisted oa the necessity in future of naturalists abstaining from publish- 
ing imperfect observations respecting them, and urged the adoption of the descrip- 
tions of Milne-Edwards, Sars, and Will as models for those who were ready seriously 
to engage in the study. He called attention to the important observations on their 
development lately made by his friend Prof. Reid of St. Andrews, and expressed a 
hope that ere long the return of the Arctic Expedition would bring a great mass of 
new materials of the most accurate description through the observations of Mr. H. 
Goodsir. In grouping the British species, Prof. Forbes calls attention to the mutual 
correspondence of certain characters; viz. of the condition of the reproductive, di- 
gestive, and sensitive systems. He proposes to group all the British Meduse under 
such as have hooded and such as have naked ocelli. The first character is combined 
with a conspicuous and comparatively complicated reproductive system, and a rami- 
fied gastrovascular apparatus. All the Pulmograda with naked ocelli have simple 
vessels, with one exception,—a new and most beautiful generic form, the type of a 
subsection by itself. The remainder form three natural groups, as will be seen in 
the following general table, exhibiting the arrangement of the British Pulmograde 
Meduse : — 
lst Secrion.—Hooded-eyed ; ramified gastrovascular system. 
Ist Genus.— Rhizostoma (Cuvier). 1 species, R. Aldrovandi. 
2nd Genus.—Cassiopea (Peron). 1 sp., C. lunulata. 
3rd Genus.—Pelagia (Peron). 1 sp., P. cyanella, one of the most phospho- 
rescent and beautiful of European Medusz, now first announced as British, 
having been taken during the past month by Mr. M‘Andrew and Prof. 
Forbes off the coast of Cornwall. 
4th Genus.— Chrysaora (Peron). 1 sp., C. hysoscella. 
5th Genus.—Cyanea (Peron). 2sp., C. capillata and C. Lamarckii, both com- 
mon; very large, stinging Medusz. 
6th Genus.— Medusa (Linnzeus, Eschscholtz—Aurelia, Peron). 2sp.,M.aurita 
and M. cruciata (the latter is the Medusa so abundant in Southampton Har- 
bour). It has white ocelli. 
Many more spurious species of Cyanea, Medusa, and other genera are recorded 
by Peron, Lesson, and others, and enumerated as inhabitants of the British Channel. 
After careful consideration, they have been rejected as mere varieties from this 
