32 Moll 
MOLLUSC A. 
of hardened sedimentary matter. In the Colorado region, they are 
associated with Tryonia protea, Amnicola longinqua , Physa humerosa, and 
a Planorbis (probably ammori), in the ancient lake bottom of the Carson 
region, with remains of Elephas, Equas, &c. ; R. Stearns, P. Cal. Ac., 
Nov. 20, 1882. 
Mauritius. 4 new subfossil species of Cyclostoma ; Morelet, J. de 
Conch, xxx. pp. 90-93, pi. iv. figs. 1-4. 
Bulimus gunni (Sow.), found fossil in the Travertine of Kent’s Group, 
Bass Strait ; Brazier, P. Linn. Soc. N. S. W. vii. p. 121. 
Historical Remains and Changes. 
A. Locard enumerates the shells found in deposits of the river Saone, 
from the end of the quaternary epoch down to the Gallo-Roman times ; 
inundations appear to have been more frequent in those days than at 
present. H. pomatia makes its first appearance in them, H. aspersa is 
still wanting. Ann. Ac. Macon (2) iv. [1881]. Abstract in J. de Conch, 
xxx. p. 254. 
A. Locard states that Ilelix rubella (Risso), cemenelea (Risso), putoni- 
ana (Mabille), acosmeta (Bourg.), neglecta (Drap.), trepidula (Servain), 
cespitum (Drap ), martinica (Mabille), lauta (Lowe), lineata (Olivi), 
pisana (Mull.), trochoides (Poir.), acuta (Mull.), Ferussacia locardi * 
(Bourg.), Pupa quinque-dentata (Born.), megacjiilus (Cristofori), and 
farinesii (Desmoul.), known before only from the Mediterranean shores 
of France, have been found recently also in the environs of Lyons, and 
concludes that they have migrated thither like some plants, of which he 
gives also several instances. Ann. Soc. Linn. Lyon, xxix.; also in his Con- 
tributions a la Faune malac. Fran?., pt. 4, 24 pp. 
J. B. Gassies states that in Guyenue Ilelix pomatia is slowly extend- 
ing its distribution, and that II. strigella (Dr.), which during the quater- 
nary period was very common, is now very rare. The author attributes 
these changes to the extirpation of wood, and thinks that from the same 
cause some other small species will finally become extinct. On the con- 
trary, Helix lactea, vermiculata, boghariensis , and Leucocliroa candidissima 
which were introduced by O. Debeaux fifteen years ago, now propagate 
themselves. Bull. Soc. Linn. Bord. 1880. Abstract in J. de Conch, 
xxx. p. 256. 
Bithynia tentaculata (L.) extends its habitat in North America; Beau- 
champ, Am. Nat. xvi. p. 244. 
Limncea stagnalis (L.) introduced intentionally in New Zealand ; 
Hutton, Tr. N. Z. Inst. xiv. p. 157. 
Use by Man. 
General remarks on eatable snails and bivalves, by II. Jordan, Hum- 
boldt i., pp. 137-145. 
Note on the breeding of Ilelix pomatia in some parts of Europe, by 
Rudolph Hessell, Bull. U. S. Fish Comm. i. p. 265. 
Mediterranean. List of 65 species of edible Mollusks of the Mediter- 
