230 Notices of Memoirs—Post- Glacial Deposits of Gotland. 
of the Siwalik period, with the exception of the small Platemys 
Leithi from the inter-trappean beds of Bombay. The first specimen 
described comprises the greater portion of the carapace and plastron 
of a Pleurodiran Chelonian, characterized by the absence of epidermal 
shields. In the latter feature it agrees precisely with the genus 
Carettochelys, recently discovered by Dr. H. P. Ramsay in the Fly 
River, New Guinea, and may therefore be placed in the family of 
Carettochelyide, as defined by Boulenger; its generic distinctness, 
however, is indicated by the neural plates being in contact, not 
separated by the costals, and also perhaps by the presence of a 
mesoplastron. ‘The plastron is marked by a pitted sculpture, and 
the genus and species receives the name of Hemichelys Warthi. he 
second fossil is much less complete than the first, and is provision- 
ally referred to a new species of Podocnemis, under the name of P. 
indica. The greater portion of the carapace is preserved, and its 
total length would probably be about 35 inches; it is oval, tectiform, 
not keeled, and narrowed posteriorly. Though now confined to 
South America, the occurrence of Podocnemis and Platemys, in the 
Indian Tertiaries, is not an altogether unexpected fact, the former, 
at least, also being met with in the Lower Eocene of England; and, 
as Mr. Lydekker remarks, the available evidence now seems to point 
to the conclusion, that the original habitat of this group of fresh- 
water Chelonia was in the northern portion of the Old World, 
whence they have been driven perhaps by the competition of the 
Emydians. AC ane 
IiJ.—Om PostGLactaLa AFLAGRINGAR MED AWCYLUS FLUVIATILIS PA 
Gortanp. Af Henr. Munrun. Ofversight af Kongl. Vetensk.- 
Akad. Forhandlingar, 1887, No. 10, pp. 719-782. 
On Post-GuactaL Deposits witH ANCYLUS FLUVIATILIS ON THE 
IsLE or Gornanp. By Henry Munrae. 
URING the last three summers the author of this paper has 
been investigating the Quaternary deposits of the Isle of 
Gotland, and he has discovered in various localities shore-deposits 
or raised beaches (Strandvallar) at different elevations up to 150 feet 
above the present sea-level, which contain the shells of freshwater 
mollusca exclusively, more particularly of Ancylus fluviatilis and 
Limnea ovata. These deposits consist of rounded stones, coarse and 
fine gravels, and intercalated beds of fine sand, they are chiefly re- 
arranged glacial deposits formed from the limestone of the district. 
The shells usually occur in the layers of sand. In 24: localities 
examined, the L. ovata is found in all save one, and the Ancylus in 
19, whilst species of Pisidium are present in 10. Other species of 
less frequent occurrence are Limneea palustris, Plunorbis contortus and 
marginatus, Valvata cristata and Bythinia tentaculata, with some 
Ostracoda. The shells are usually well preserved. 
Some of these raised shelly beaches are situated on the summits 
of partially or entirely isolated limestone plateaux, where there is 
not the least ground for supposing the former existence of small 
