GEOGRAPHICAL DISTRIBUTION. 
131 
woods are incidentally mentioned as regards Sleswick and Holstein by 
Friedel, Mai. Bl. xvii. p. 00. 
Ventfs merccnaria, L., its acclimatization failed at Arcaclion. Mdbiiis, 
Austern- u. Miesiniischelzuclit, p. 11. 
Palaeontology of Rece?it Species. 
Some remarks on the shells found in diluvial beds near Pots- 
dam are given by E. Friedel. Helix pulchella (Miill.) is the 
only terrestrial species among them ; amongst the others are 
Paludina diluviana (Kunth), Valvaia contorta (Menke), V. fora- 
minis (Braun) ^xoh 2 h\j — macrostoma (Steenstrup), and Bithynia 
tentaculata (L.). Neither he nor Dr. Reinhardt could find 
Tichogonia [Dreisse^ia'] in the undisturbed beds^ although a few 
single shells of it are said by others to have been found there or 
in other diluvial deposits; it is probable that these were recent, 
and occurred accidentally on the surface of those beds. Nachr. 
mal. Ocs. ii. pp. 177-180. 
Subfossil specimens of Helix nemo?'aUs (L.), exhibiting a round perforation 
like that caused in marine shells by Mtircx erinaceiis, have been observed by 
Colbeau, Ann. mal. Belg. iii. 18G8, p. Ixi. 
Melanopsis dufourei (Fer.) has also been found in quaternary limestone- 
tuff in Tuscany, which proves that it has not been introduced of late years. 
Appelius, Nachr. mal. Ges. ii. p. 46. 
In the elevated prehistoric oyster-banks of the western shores of Sleswick 
Ostrea cdulis (L.) and Ostrea hippopus (Lam.) are to bo found mingled 
with each other in the same bank. Friedel, Mal. Bl. xvii. pp. 79, 80. 
A rather large number of recent Mediterranean shells, found 
in the pleistocene clay at Ficurazzi and in limestone at Monte- 
pulciano in Italy, are enumerated by Allery de Monterosato, 
Bull. mal. Ital. iii. pp. 44, 45. The shells of the pleistocene 
clay at the base of Mount Etna are enumerated by A. Aradas 
in liis ^ Conchiologia Etnea,^ Att. Soc. Ital. xii. 1869. 
Not only the quaternary and pliocene beds in Italy, but also 
those undoubtedly older than the pliocene proper, contain spe- 
cies of shells which do not live at present in the Mediterranean, 
but in the Northern seas of Europe. G. Seguenza, Bull. mal. 
Ital. iii. pp. 65-74. 
Fourteen species of sea-shells from the recent deposits at the Bitter Lakes 
near Suez are enumerated by P. llscher, ,T. de Conch, xviii. p. 172 ; they all 
belong to the recent fauna of the Red Sea, except Cardium cdide (L.). 
Apparent kitchen-middens, containing shells of recent species 
of sea- and larid-mollusks, have been found by F. Stoliezka 
on the Andaman Islands and described in J. A. S. B. 1870, 
pp. 1-11. 
