LUSITANIAN REGION. 91 
Bithyvia Kickxii, R. Ami, Altai. Anodon anatinus, Tunguska. 
Valvata cristata, var. Sibirica, Bernaul, »  cellensis var. Beringiana, Kamt- 
Beresov; Kamtschuatka, schatka, 
4 piscinalis, R. Ami. Cyclas calyculata, Bernaul, R. Lena, R, 
Unio complanatus Kamtschatka, Ami, S. Kamts. 
y Dahusicus, Mid. Schilka. Pisidium fontinale, Beresov. 
» Mongolicus, M. Gorbitza, Dauria. “6 obliquum, Bernaul, Tomsk. 
Anodon herculeus, M. Scharanai. 
2. LUSITANIAN REGION. 
The countries bordering the Mediterranean, with Switzerland, 
Austria, and Hungary, the Crimea (Yaurida), and Caucasus, 
form a great province (or rather cluster of provinces) to whick 
Professor E. Forbes applied the term Lusitanian. The Canaries, 
Azores, and Madeira are outlying fragments of the same region.* 
In Southern Europe about 600 land-snails are found, of 
which above 100 are also spread over the Germanic region and 
Siberia; and 20 or 30 are common to Northern Africa. Besides 
these 60 others are found in Algeria and Egypt, 100 in Asia 
Minor and Syria, and 135 in the Atlantic Islands, making a 
total of nearly 900 species of Helicidee.+ 
Of the 12 species of Zonites (proper) 10 are peculiar to 
Lusitania. 
The species of Bulimus, Achatina, and Pupa are small and 
minute, belonging to the sub-genera Bulimulus, Cionella, Zua, 
Azeca, Vertigo, &c.; 4 (of which 2 are Algerian) have been 
referred to Glandina. 
In this region are also found 22 species of Cyclostomide and 
44 Limacide :— 
EU CLIX cceasstscessccsse0. Oe Witrinaetctesctune foo LL Cryptellamaaescenecteemel 
SUETUSY ycisasscsiceees 80 Daudebardia........... bie) Cyclostoma, ......... Bed Ae 
STECICTTGE Ba ane 8 HeliCOlMMax se «scces5 3 Craspedopoma. ......... 3 
PCISLIME §Sssiccsesscsvee 25 IMA eascseceenceoss + 28 JE{OVOOENDEN) Geccenoorepso: 10 
Tornatellina .......... ae PATTON ccenensedentaee cass 7 Acicula ........ Rawneneiee 4 
EY AUAN Se scenevecas seses 4 Phosphorax: 2i...--0.<. 1 — 
PERU Ascrrecccccesrvessscss 120 PREStACE atest seesiea 2 CaryCliuni esse cess bale 
UAUSUTA Toc sccccdecaee 247 Parmacellay Jescuceccse 5 
The fresh-water are shells of the same genera as in the Ger- 
panic province, and the numbers about the same; with the addi- 
tion of several species of Melania, Mclanopsis, Lithoglyphus, and 
Cyrena. Melanopsis buccinoides is found in Spain, Algeria, and 
* In the South of Europe rain seldom falls in summer, but is frequent at other 
seasons, especially in-winter. Tle mean temperature is 54°—72°. 
7 The writer is greatly indebted to W. H. Benson, Esq., for information respecting 
tlie land-suells of the Lusitanian province, Africa, and the remote islands. 
¢ Many of these cannot be considered species, in the sense here understood, but only 
&S races, Or Seographical varieties, 
