THE LAND AND FRESH-WATER MOLLUSCA. 187 
P. parvus, Say. (=P. glaber, Jef.)—L. Greenan nr. Rothesay (S.). 
P. spirorbis, J/i/7.—Small M. on Rutherglen Rd. ; Bishop L. ; Pool nr. Inver- 
kip; Arran (B.); nr. Paisley ; Port-Glasgow ( 6. ); Pond above Kerrycroy, 
Bute (R.). : 
Yr. Beertin (Zin.).—Pond nr. Robroyston ; Frankfield Ee, Araw (Br Ue 
Greenan and L. Fad (C.). 
Physa fontinalis (Zzn.). =. (B.); Possil M., Paisley Cnl., Ditch at Greenock, 
L. Fad, ete. (C.). 
Limnaea peregra (Jil/.). may, and gen. dist. 
var. lacustris (Zeach).—R. Clyde above Rutherglen (C.). 
var. ovata, Drap.—C. with the type (B.); Blantyre; Greenock; L. 
Greenan (C.). 
L. auricularia (Zin.).—-Paisley Cul. (C.); formerly c., now probably extinct as 
‘the canal bed has been utilized largely by a railway. 
L. stagnalis (Zin.).—Possil M., introduced (B.) ; Old Quarry at Possil, intro- 
duced and now extinct (C.); dam at Greenock introduced, 1882 (8.). 
L. palustris (J/id/.).—-Possil M.; Bardowie and Frankfield Ls.; Arran (B.) ; 
Pools nr. Port-Glasgow on side of Kilmalcolm Road (G.); L. Greenan (S8.). 
L. truncatula (J/iil.).—C. (B.); R. Clyde above Rutherglen ; Greenock ; 
Largs ; E. Tarbert ; Bute (C.). 
var. minor, Moq. —Holy eC.) 
L. glabra (Mil/.). ‘Veankfeld L., prob. introduced (B.). 
Ancylus fluviatilis, Miill.—O. in running streams (B.); Coatbridge; 
Greenock ; Dunoon ; Largs; E. Tarbert ; Bute (C.). 
Velletia lacustris (Zin.).—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 Pectinibranchiata. 
Fam. Paludinidae. 
Bythinia tentaculata (Zin.).—Possil M.; St. Germains’ L.; Forth and Clyde 
Col.; Paisley Cnl. (B.). 
var. producta, Menke.—Glasgow and Paisley Cnl. (C.). 
Fam. Valvatidae. 
Valvata piscinalis (J/ill.)—Possil M.; Forth and Clyde Cnl. at Dalmuir ; 
Paisley Cnl. (B.). 
V. cristata, W/iull.—Possil M. ; Forth and Clyde Cnl. at Firhill (B.). 
ACHPHALA. 
ORDER PELECYPODA. 
Sub-Order Isomya. 
Fam. Unionidae. 
_ Unio margaritifer (Zin.).—R. Clyde at Cambuslang (B.); R. Gryfe nr. Kil- 
malcolm (C.). 
Anodonta cygnea (Lin.).—Paisley Cnl.; empty shells in Bardowie ve 1B 
Cart at Cardonald Mills; R. Clyde above Cambuslang (B.). 
var. incrassata (She pp.).— Paisley Cn.) 
var. radiata (J/ull.).— Paisley Cnl. (C.) 
