THE LAND AND FRESH-WATER MOLLUSCA. 187 



P. parvus, Say. ( = P. glaber, Jeff.) L. Greenan nr. Eothesay (S.). 



P. spirorbis, Mull. Small M. on Rutherglen Rd. ; Bishop L. ; Pool nr. Inver- 



kip ; Arran (B.) ; nr. Paisley ; Port-Glasgow (C.) ; Pond above Kerry croy, 



Bute (R.). 

 P. contortus (Lin.). Pond nr. Robroyston ; Frankfield L. ; Arran (B.) ; L. 



Greenan and L. Fad (C.). 

 Physa fontinalis (Lin.). C. (B.) ; Possil M., Paisley Cnl., Ditch at Greenock, 



L. Fad, etc. (C.). 

 Limnaea peregra (Miill.). C. and gen. dist. 



var. lacustris (Leach). R. Clyde above Rutherglen (C.). 



var. ovata, Drap. C. with the type (B.) ; Blantyre ; Greenock ; L. 



Greenan (C.). 

 L. auricularia (Lin.).- -Paisley Cnl. (C.) ; formerly c., now probably extinct as 



the canal bed has been utilized largely by a railway. 



L. stagnalis (Lin.). Possil M., introduced (B.) ; Old Quarry at Possil, intro- 

 duced and now extinct (C.) ; dam at Greenock introduced, 1882 (S.). 

 L. palustris (Niill.).- -Possil M. ; Bardowie and Frankfield Ls. ; Arran (B.) ; 



Pools nr. Port-Glasgow on side of Kilmalcolm Road (G.) ; L. Greenan (S.). 

 L. truncatula (MiilL). C. (B.) ; R. Clyde above Rntherglen ; Greenock ; 



Largs : E. Tarbert ; Bute (C.). 

 var. minor, Moq. Holy I. (C.). 



L. glabra (Miill.). Frankfield L., prob. introduced (B.). 

 Ancylus fluviatilis, Miill. C. in running streams (B.) ; Coatbridge ; 



Greenock ; Dunoon ; Largs ; E. Tarbert ; Bute (C.). 

 Velletia lacustris (Lin.). Possil M. ; Bishop L. ; Forth and Clyde Cnl. at 



Old Kilpatrick (B.). 



ORDER OPERCULATA. 



Sub-Order Pulmonata. 



Fam. Aciculidae. 



Acicula lineata (Drap.). Lanarkshire (Jeff.) ; nr. Cloch L. H. ; Skel- 

 morlie (C.). 



ORDER OPERCULATA. 

 Sub- Order PectinibrancTiiata. 



Fam. Paludinidae. 



Bythinia tentaculata (Lin.). Possil M. ; St. Germains 3 L. ; Forth and Clyde 



Col. ; Paisley Cnl. (B.). 

 var. producta, Menke. Glasgow and Paisley Cnl. (C.). 



Fam. Valvatidae. 



Valvata piscinalis (MiilL). Possil M. ; Forth and Clyde Cnl. at Dalmuir ; 



Paisley Cnl. (B.). 

 V. cristata, Miill. Possil M. ; Forth and Clyde Cnl. at Firhill (B.). 



ACEPHALA. 



ORDER PELECYPODA. 



Sub-Order Isomya. 



Fam. Unionidae. 



Unio margaritifer (Lin.). R. Clyde at Cambuslang (B.) ; R. Gryfe nr. Kil- 

 malcolm (C.). 

 Anodonta cygnea (Lin.). Paisley Cnl. ; empty shells in Bardowie L. ; R. 



Cart at Cardonald Mills ; R. Clyde above Cambuslang (B.). 

 var. incrassata (Shepp.). Paisley Cnl. (C.). 

 var. radiata (Miill.). Paisley Cnl. (C.) 



