LUSITANIAIf EEGIOX. 



91 



Bithyvia Kiokxii, R. Ami, Altai. 

 Valvata cristata, var. Sibirica, Bernaiil, 

 Beresov ; Kamtsciiutiva. 

 „ pitfciiiali-, R. Ami. 

 Unio cniiipliinatiis Kani:si!iatka. 

 „ Daliiisicii;?, Mill. Scliillva. 

 „ Moiijioliius, M. Goibitza, Dauria. 

 Aaotlon lierciileus, M, Scliaranai. 



Aiiodon anatimis, Tunpuska. 



„ cellensis var. Beringiaiia, Kamfc- 

 scliatka. 

 Cyclas calyculata, Bemau], R. Lena, R. 



Ami, S. Kamts, 

 Pisidimn fontinale, Beresov. 



„ obliquum, Bemaiil, Tomsk. 



2. LUSITAXIAX EeGIOX. 



The countries bordering the Mediterranean, with Switzerland, 

 Austria, and Hungary, the Crimea {2\iurida), and Caucasus, 

 form a great i:)rovince (or rather cluster of provinces) to which 

 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 Xorthern 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 oi IIeUcidce.-\ 



Of the 12 species of Zonites (proper) 10 are peculiar to 

 Lusitania. 



The species of BuUmuSy Achatina, and Pupa are small and 

 minute, belonging to the sub-genera Bulimulus, Cloivdla, Zua, 

 Azeca, Veriiyo, &c. ; 4 (of which 2 are Algerian) have been 

 referred to Ghmdina. 



In this region are also found 22 species of Ci/dostomidce and 

 44 Limacidce: — 



Helix 392 



Bulinuis 80 



Succinea 8 



Achatina 25 



Tornatellina 3 



Balea 4 



Pupa 120 



Clausiiia; 247 



Vitrina 11 



Daudebardia 3 



Helicolimax 3 



Limax 23 



Arion 7 



Pliosiilinrax 1 



Testacella 2 



Pamiacella 5 



CniJtella 1 



Cyclostoma 5 



Ciaspedopoma 3 



Pomatias 10 



Acicula 4 



Caivcliiiun 3 



The fresh-water are shells of the same genera as in the Ger- 

 r lanic province, and the numbers about the same; with the addi- 

 tion of several s])ccies oi Mchuu'a, Mdunopsis, Litlio(jly pints, and 

 Cyrtna. Melanopsis huccinoides is found in Spain, Algeria, anj 



* In the South of Europe rain seldom falls in summer, but is frequent at other 

 Beasons, especially in winter. Tlie mean temiierature is 54* — 72^. 



t Tlie writer is greatly indebted to W. H. Benson, Esq., for informatiou respecting 

 the land-shells of the Lusitanian province, Africa, and the remote islands. 



X Many of these cannot be considered species, in the sense here understood, butoii^y 

 as r:cc^, cr geographical varieties. 



