MOLLUSCA. 
619 
that of the Southern Japanese islands, but only impoverished in 
species. This is ascribed chiefly to the less amount of salt in 
the water of the Gulf of Tartary — which receives the Amur river, 
and is in this respect analogous to the Baltic and Black Sea when 
compared with the North Sea and the Mediterranean. The dis- 
tribution of the mollusks in different depths could only be 
ascertained in the Bay of Castries. It is carefully compared with 
our knowledge of the same subject in European seas ; and Dr. 
Schrenck is inclined to agree with a statement of Dr. Lorenz, 
viz. that in more southern regions the bathymetrical zones are 
of less vertical extent, the same vertical differences of depth 
offering a greater difference of molluscan forms in the Adriatic 
than in Norway or in the Bay of Castries. Finally, the Re- 
corder is bound to acknowledge the great care with which Dr. 
Schrenck has accomplished his task. He has evidently taken 
the works of Middendorff as a pattern for himself. The number 
of really new species in this work is small. Dr. Schrenck having 
published already, some years ago, the most interesting in the 
Bulletin of the Acad, of St. Petersburg, vol. v. 
The malacological fauna of the middle part of Japan, especially 
the bay of Yeddo, has been examined by C. E. Lischkb, Mai. 
Blatt. xiv. pp. 106-182, who enumerates and partly describes 55 
species, among wh ch 28 Gastropods and 23 Bivalves. 
The same subject is treated in a more general manner by the 
Recorder in his account of the Prussian Expedition, Zool. vol. i. 
pp. 139-142, 145-147, where he enumerates the mollusks found 
xn the markets of Yeddo and Yokohama, and in the Bay of 
Nagasaki, adding their Japanese names. 
6. Pacific coast of North America, 
Vancouver Island. Fifty-nine species of sea-skells are enumerated by 
Baird, in Lord’s ^Naturalist of the Vancouver Island and British Columbia,^ 
vol. ii. pp. 866-370, 1860, 42 being Gastropods ) the principal genera are 
Crepidula 6 sp., Tectura 8 sp., and Chiton 3 sp. {ChitonidcB 7 sp.). Chr- 
dium corhis (Martyn) and Mytilus californiemis are collected and eaten by 
the Indians. 
California. Rob. E. 0. Stearns has published a list of 84 species from 
Bauline’s Bay, and another of 92 species from Santa Barbara and S. Diego. 
Proc. Calif. Acad. Nat. Sc. vol. iii. 
Panama. Forty new species are described, and several others noticed, by 
Folin, in his work ^Les M6l(5agrinicoles ’ (see p. 487). All were found on 
pearl-oysters. 
d. Palceontology of Recent Species, 
In the diluvial strata of the valley of the Weichsel in Prussia, 
from its delta to the frontiers of Russian Poland, there were 
discovered, some years ago, remains of shells belonging to recent 
species, an account of which has been published by Dr. G. Be- 
RENDT in ^Schriften derphysikalisch-okonomischen GesellschafV 
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