MOLLUSCA. 
527 
litssoa nlvcc (Penn.), Alcleria modest cs {'I ^ m(\. Limaijontia depressa. In 
pools further removed from the saline influence, hut in company with Crus- 
tacea indicating a .somewhat mixed saline character, have been found LitnncBa 
peregra (Miill.) and IHsidium ptdcheUum (Jenyns). G. S. Brady, Nat. Hist. 
Transact, of Northumb. and Diirliam, ili. 1, p. 121. 
The sea-shells mentioned by G. Brocchi as being found in the brackish 
lake Mareotis, near Alexandria, are mentioned by E. v. Martens, Mai. Blatt. 
xvi. p. 85. 
c. Marine Fauna. 
Manzoni treats of the oeeurrenee of marine species under 
various physical and chemical conditions. Bull. Malac. Ital. ii. 
pp. 81-104. 
1. Coasts of Europe. 
Petit^s Catalogue of European Shells is a systematic list of 
all the species witli their synonyms ; their geographical distri- 
bution through tlic Polar, Boreal, Britisli, Celtic, Lusitanian, 
Mediterranean, and Algerian zones is shown in a table. A list 
of pseudo-European species and instructions for collecting shells 
are added. 
Spitzhergen. The mollusks of this island have been examined 
by I)r. Morch. He enumerates 80 species of sea-shells, and 
points out that the G astropods are found to have a thinner shell, 
to be of larger size, and to want the ribs, when compared with 
specimens from Greenland, and that the bivalves are generally 
of smaller size. Peculiar to that island are Trichotropis kroyeri 
(Phil.), Tritomwn \Buccinwni\ angulosmi (Donovan) and ienue 
(Gray), Fusus deformis (Reeve), Nuculana [Portlandia) frigida 
and abyssicola (Thorell). Ann. Soc. Malacol. Belg. iv. 
Norway. Four species of Brachiopods, 29 of Bivalves, and 
50 of Gastropods, living at a depth of from 200 to 300 fathoms, 
are enumerated by M. Sars, Vidensk. Selsk. Forhandl. p. 246, 
Ann. & Mag. Nat. Hist. iii. p. 429. At 450 fathoms occur the 
following only : — Pecten mammillatus, sp. n., Limopsis minuta 
(Phil.), Nucula purnila, Asbjornsen, MS., KeUiella abyssicola 
(Sars), Axinus jlexuosus (Montagu) and A. pusillus (Sars), 
Lyonsiella abyssicola (Sars), Neaera obesa (Loven), SijAionoden- 
talium quinquangulare (Forbes) and subfusiforme (Sars), and 
Cyclostrema nitens (Phil.). 
Great Britain. The total number of British Mollusca de- 
scribed in the now finished ^ British Conchology' by Jeffreys is 
685, viz. 124 land and freshwater species (Conchifera 15, Gas- 
tropoda 109) and 562 marine species, among which Brachiopoda 
6, Conchifera 171, Solenoconchia 5, Gastropoda 366, Pteropoda 
2, and Cephalopoda 12 ; a few others are doubtful. The author 
thinks the subject to be far from being exhausted. 
German Ocean. A list of G5 species found at the island of Sylt is given 
