l6o HULL SCIENTIFIC AND FIELD NATURALISTS' CLUfe. 



Var. stagnaliformis Taylor. Buckton (W.C.H. in J.W.T., J. of C. 



4, p. 82). Kirkburn Gypsey Race (E. P.B.). 

 Subfossil. Bridlington (Lamplugh in C. Reid p. 73; W.C.H., Nat. 12 

 p. 374). Hornsea (H. F. Hall, p. 45; Reid p. 82; T. Sheppard, 

 Nat. 27, p. 366). South of Withernsea (W.D.R. J. of C. 7, p. S8). 

 Easington ; Holmpton ; Nevilles Dyke ; Mappleton ; Atwick Gap ; 

 Atwick; Skipsea ; Ulrome (T.P.). Limnaga, Bridlington (Phillips, 

 1875, p. 83). Several species, Dimlington (?), (H. F. Hall, p. 39). 



Limnsea auricularia (Linn.). 



Apparently a rare species in the East Riding where it 

 seldom attains large dimensions. 



Derwentland. — Fine and characteristic at York (Hincks, Forbes and 

 Hanley 4, p. 172); occurs rarely in the Ouse (R.M.C.). Newsholme, 

 rare (J. Beanland). 



Wolds.— Kildwick Percy (Y.N. U. 1893). 



Holderness. — Driffield canal (L. B. Ross and J.D.B. circular 145). 

 Foston (L. B. Ross, J. of C. 4, p. 356). Leven canal (J.D.B. 3). 

 Hornsea Mere (C. Reid, p. S3; "in the deeper parts," F.W.F. 

 Fretwell's Guide and circular 150). Swine; Burstwick drain; Sutton 

 drain; local (T. P. ). Foston stream and canal; Hornsea Mere; 

 RotseaCarr; canal, Wansford Road (E.P.B.). 



Subfossil. Hornsea (T. Sheppard, Nat. 27, p. 366). 



Limnsea stagnalis (Linn.). 



Not a common species. As it is rare in the lacustrine 

 deposits it is probable that it has never been common. 



Derwentland. — York district ; common (S.W.N.); quitea raritv (R.M.C.). 

 Riccall (Y.N.U. 1875). Newsholme (J.B.). Wressle (G.R.). 

 Featherbed Lane (Win. Nelson, J. of C. 5, pp. 262-67). Breighton 

 (J.D.B. circular 75). 



Wolds. — Boynton fishpond (W.C.H. , Nat. 12, p. 374}. Risby fishpond, 

 very sparingly (J.D.B. 3). 



Holderness. — Driffield (L. B. Ross circular 145). Beverley (J.D.B. 1) ; 

 formerly at Figham, but dead shells only to be found now (J.D.B. 3). 

 Cottingham Road ; fine in Spring Dyke (J.D.B. 1). Hornsea Mere 

 (Y.N.U. 1881 ; C. Reid, p. 83). Kelsey Hill; Burstwick drain; 

 Lambwath stream and ditches, Marton to Aldborough ; Keyingham 

 drain ; Grimston ; broken shells round a " thrush stone," Kelsey 

 Hill, April 21st, 1903; not common (T.P.). Endyke Lane (J.W.B.). 

 Driffield canal ; Foston streams; Hornsea Mere; North Frodingham, 

 drain near canal (E. P. B.). 



Var. fragilis (Linn.): — York, rare (S.W.N. ). Wressle, a small form 

 like fragilis in the Fleetdyke in 1S84 (G.R.). Kelsey Hill (?) (T.P.). 



Subfossil. Skipsea, a few (Phillips, 1829, p. 64 ; 1875, p. 80 ; C. Reid, 

 p. 79). Hilston, plenty (Phillips, 1S29, p. 64; 1875, p. 74). One 

 example, south of Withernsea (by E. Hawkesworth, W. D.R., J. of 

 C. 7, p. S8). Holmpton ; Nevilles Dyke ; Atwick; rare (T.P. ) 



