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TRANSACTIONS OF THE SECTIONS. 83 
This sac, as well as the multifid vesicles, of which there are four sets, opens into the 
common sac of generation. 
Notices of some new and rare British species of naked Mollusca. 
By Josuua ALvER and ALBANy Hancock. 
The first species was a small mollusk belonging to the order Inferobranchiata, 
This animal closely resembled the animals figured by M. de Quatrefages under the 
generic names of Pelta and Chalides, and placed by him as the lowest forms of his 
new order, Phlebenterata. This animal strongly resembles the Limapontia nigra of 
Dr. Johnston ; but whether it be identical with that animal or not, the authors were 
~ fully convinced that its characters had been imperfectly understood by M. de Qua- 
trefages. The other naked moliusks found by the authors were a new species of 
Eumenis, Eolis Drummondi, Eolis alba, and Goniodoris castanea. 
On the Hybernation of Snails. By Rev. T. Ranxin, M.A. 
From the author’s observations on the habits of Helix hortensis, he concluded,— 
1. That snails hybernate. 2. That in their state of hybernation they undergo less 
torpor than some other animals which hybernate. 3. That they are destructive to 
trees as well as to plants. 
Mr. Wollaston read a notice from Mr. William King of some new species of 
animals found on the coast of Northumberland. 
Mr. R. Patterson exhibited specimens of Ascidians which he had discovered in the 
links of the chain of the floating bridge at Itchin, near Southampton, 
A few Notes on the Land Mollusca, Zoophytes, and Alge of the Isle of Wight. 
By W. Tuomprson. 
The object of this communication was to inform naturalists visiting the island what 
ete they might expect to find in the classes indicated, which are less known than 
the other departments of its natural history: lists of these were given. Rare and in- 
teresting species were noticed, and the localities where they had been obtained by the 
author particularized. Freshwater Bay and the adjacent coast to the east of it, were 
_ stated to be the best localities for the marine invertebrate animals and Alez. Of land 
_ mollusca; the Pupa secale and Bulimus acutus were specially neticed. Of Zoophytes ; 
the Anguinaria spatulata was found commonly investing the stems of various Alez 
_ on the south coast of the island. Of Algz; the Griffithsia simplicifilum was obtained 
Bersully at Freshwater Bay, in August 1841, by Mr. R. Ball and the author—the 
rst pine of its being noticed elsewhere in the British island, than on the coast of 
icklow, 
_ Additions to the Fauna of Ireland, including Species new to that of Britain. 
By W. Tuomrson*. 
_These additions comprised about fifty species of vertebrate and invertebrate animals. 
Those unrecorded in the British Fauna were the purple water-hen (Porphyrio 
hyacinthinus), obtained in the county of Kerry by Richard Chute, Esq.; the Tellina 
balaustina, and Pleurotoma striolata, both known as Mediterranean species—the 
former procured by Mr. Barlee, the latter by Mr. M‘Andrew, on the western coast 
of Ireland; Botrylloides albicans (Edw.), and B. rotifera (Edw.), collected on the 
coast of Down, by the author; and Pontobdella levis (Blainville). A new Actinia of 
the genus Corynactis (Allman) was noticed; and two new species of Amorphozoa 
(Sponges), and a Daphnia, believed to be undescribed, were stated to have been 
obtained. “ Dysidea? papillosa” (Johnston), whose place in the system had been 
uncertain, was lately ascertained by the author to be a helianthoid zcophyte, of the 
genus Zoanthus (Z. Couchii). ; 
* Published in detail in the Annals of Natural History for Nov. and Dec. 1846 (vol. xviii.). 
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