122 
MOLLUSCA. 
{Onchidium celtioum)^ and 11 Oephalopods, found on the western coast of 
France. P. Fisciier, J. de Conch, xx. pp. 1-26 (2nd suppl. to former 
paper). 
2. Baltic. 
Vol. 2 of Meyer and Mobius^s Fauna of the Bay of Kiel 
was published in 1872 (see Zool. Bee. ii. p. 235). The intro- 
duction gives an interesting account of the depths, currents, and 
amounts of percentage of salt in the water of the western part of 
the Baltic. An undercurrent of specifically heavier and more 
saline water is traced distinctly to the island of Bornholm ; 
and it nourishes several marine animals which are wanting in 
the other parts of the same sea. The annual variations in tem- 
perature and amount of salt are rather large in the Baltic, and 
much larger in the eastern part of it ; and to these chiefly is due 
the small number of living marine species (63) in that sea. Most 
of these species have also a large geographical distribution from 
the more northern shores of Europe to the Lusitanian zone, and 
they may be called eur'ij thermal, on account of their indifter- 
cnce to tlie changes of temperature. Generally (but not always) 
the specimens from the Baltic are of smaller size than those 
from other seas ; but in the bay of Kiel especially some reach a 
considerable size. The species described and figured from 
living animals, comprising the Prosobranchia, the Lamelli- 
branchia, and a supplement to the Opisthobranchia, will be 
mentioned hereafter. 
Missoa imrva (Da Costa) with its var. interrupta (Ad.), M. octona (Nilss.), 
and LUorina ohtusata (L.), observed in the Baltic at the shores of Mecklen- 
burg, by Arnold Wiechmann. Arch. Ver. Mecklenb. xxv. p. 95. 
3. Mediterranean. 
The Marquess T. A. de Monterosato has published a list of 
all species of shells living in the Mediterranean (including some 
new, but not described or figured ; so that they cannot be con- 
sidered as published). The author chiefly follows Jeffreys in 
the synonymy and discussion of the critical species ; but, from a 
personal examination of important continental collections (be- 
sides his own), he has often had the advantage of comparison 
with original specimens. Some species living on the coast of 
Algiers and the eastern coast of Spain are excluded by him, as 
he thinks them rather to be Atlantic. 
The Conchigliologia vivente marina della Sicilia,^^ published 
by Aradas and Benoit in 1870, contains only the Bivalves, 245 
spp., the Brachiopods, 14spp., and the Pteropods, 15 spp., with 
synonyms and localities, but without descriptions. A few species 
figured will be mentioned hereafter. 
