8G0 T. BELT ON THE STEPPES OF SOUTHERN RUSSIA. 



No. 3. Picked out of rain-wash on talus-slope of Diluvial Clay at 

 Podwolochisk, same as in No. 1, with the addition of 



Vertigo edentula, Drop. 



No. 4. Lower part of Diluvial Clay at Taganrog : — 



Lithoglyphus naticoides, Ferussac. 



Bithinia Leachii, Sheppard. 



Melania, sp. (fragment). 



Fairbankia, sp. ; allied to F. bombayana, Blanford. 



Valvata piscinalis, Midi. 



Valvata macrostoma, Steinbuch. 



Valvata, sp. 



Planorbis albus, Mull. 



Planorbis spirorbis, L. 



Planorbis complanatus, L. 



Succinea oblonga, Drap. 



Helix pulcbella, Mull. 



Helix, sp. (fragment). 



No. 5. Sands below Diluvial Clay at Taganrog : — 



Dreissena polymorpba, Pallas. 



Sphajrium rivicola, Leach. 



Sphserium soliclum, Normand. 



Unio pictorum, L. ; var. elongata, v. Muhlfeldt. 



Unio crassus, Nilsson. 



Anodon, sp. 



Cardium edule, L. (fragment). 



Adacna edentula, Pall, (fragments). 



Lithoglyphus naticoides, Fer. 



Paludina vivipara, L. 



Paludina lenta, Brander = P. unicolor, Olivi. 



Hydrobia, sp. 



Valvata piscinalis, Mull. 



Planorbis complanatus, L. 



No. G. llecent shells from sand taken out of the river Bug: — 



Sphaerium rivicola, Leach. 

 Unio pictorum, L. 

 Unio crassus, Nilss. 

 Unio batavus, Nilss. 

 Neritina fluviatilis, L. 

 Litboglypbus naticoides, Fer. 

 Bithinia tentaculata, L. 

 Melanopsis Esperi, Fer. 

 Melanopsis acicularis, Fer. 



No. 7. llecent shells from the beach of the Sea of Azof : — 



Dreissena polymorpha, Pall. 



Unio pictorum, L. ; var. elongata, v. Muhlfeldt. 



Anodon, sp. 



Cardium edule, L. (valve). 



Adacna edentula, Pall. 



Paludina vivipara. L,. 



Limnea peregra, Midi. ; var. maritima, Jeffreys. 



