MOLLUSCA. 
6U 
are briefly described and all illustr6,ted by woodcuts, Helix hortenais and 
[Ifyalind] cellaria are the only two species acknowledged to be identical with 
European j the former is stated to be found in great abundance on certain 
most uninhabitable ” islands on the coast of Maine^ and also on the lower 
parts of Cape Cod and Cape Ann, as well as in Canada and Nova Scotia j II. 
cellaria in cellars and gardens. Both are supposed to have been imported 
from Europe through the medium of commerce. Vitrina Iwipida, H. cher^ 
sina and minuta are distinguished as species from the nearly allied European 
forms. 
Labrador. A. S. Packabd enumerates thirteen species of land-snails in- 
habiting Labrador, including those which were collected at the Mingan 
Islands by the Anticosti Expedition. They are \—Limax agrestie (L.), F?- 
trina angeliccc (Moller), Conulus fahricii (Moller), Hyalina arhorea and cher^ 
sina (Say), Helix striatella (Anthony), Zoogenetesharpa (Say), Zua luhricoides 
(Stimps.), Pupa hadia (Adams) and hoppii (Moller), Sttccinea ohliqua and 
avara (Say), S. verrillii (Bland). Freshwater shells only two — Pisidium 
steenhuchii (Moller) and Alasrnodonta arcuata (Barnes), the latter also very 
abundant in the streams of Newfoimdland. Mem. Bost. 8oc. Nat. Hist. i. 
pp. 280, 289, 290. 
California. For Cooper’s paper on the Californian Helices, see the special 
part of this Record. 
b. Fauna of brackish water. 
Blanford^s list of estuary shells collected in the delta of the 
Irawady is a most valuable contribution to our knowledge of 
those mollusks which live near or on the borders between fresh 
and salt-water — a rather distinct fauna, to which the Recorder 
has called the attention of malacologists in some previous pa- 
pers (TroscheFs Archiv. f. Naturgeschichte, 1858, and Pfeiflbr^s 
Mai. Blatt. x. 1863) . Mr. Blanford says that the fauna and flora 
of the Irawady appear to be twofold : — First, further from the 
sea, where the water is more or less brackish, and the creeks are 
mostly narrow and deep, with steep banks, which are covered at 
high water and bordered by an unbroken belt of salt-swamps. 
There live several species of Neritina, subgen. Dostia, Tecturafiu- 
viatilis (n.), Modiola emarginata (Bens.), Martesia fluminalis (n.), 
Sphenia perversa (n.), Scaphula deltm (n.) ; a species of Teredo 
perforates the dead trees j the salt swamps are peopled by Auri~ 
cula judee, Cyrena hengalensis (Lam.), the botanist finding the 
high-growing Secondly ,\o^ex down, where the creeks 
are broader, the belt of salt swamps narrower, and a broad 
shelving muddy shore succeeds, where Avicennia and Nipa are 
characteristic trees, the following mollusks are found : — Po- 
tamides, several species, Litorina melanostoma (Gray) and scabra 
(L.), Assiminea rubella (n.), Amphibola burmana (n.), Plecotrema 
cumingiana (n.), Haminea tenera {K. , Stenothyra monilifera 
(Bens.), Area granosa (L.), Nassa planicostata (A. Ad.), and 
Columbella duclosiana (Sow.) . Mr. Blanford confirms an 
observation made some years previously by the Recorder that 
none of the eastern AuriculidcB ^Auricula, Cassidula, Melampus, 
