164 HULL SCIENTIFIC AND FIELD NATURALISTS' CLUB. 



Holderness. — Driffield, debris from canal (J.D.B. circular 145). Barms- 

 ton drain (J.D.B. 1 and 2). Abundant in the R. Hull at Grovehill, 

 where the specimens are thickly encrusted with a calcareous deposit 

 (J.D.B. 3). Sutton drain (T.P., Trans. I. p. 101). R. Hull at 

 Gibraltar, dead (H. M. Foster). " In slow running rivers as the 

 Humber" (T. Brown "Illustrations," 1S44, p. 26), is evidently 

 error. Common in the river at Rotsea ; dead shells at Wansford 

 lock(E.P.B.). 



Viviparus contectus (Millet). 



This species only occurs in the neighbourhood of Wressle, 

 where Dr. Martin Lister discovered it more than two hundred 

 years ago. 



Derwentland.— Fulford, near York (YV.C.H.) ; dead shells occurred at 

 Fulford two years ago, but none since, I believe (W.C.H. in N. & T., 

 18S3). " In fossis ad fluvium Darwent juxta Bubwith octavo ab 

 Eboraco miliari magna copia reperiuntur" (Lister, Hist. Animalium 

 Anglias 1678-81, p. 134). Between Wressle and Breighton in a 

 tributary of the Derwent (W. Nelson, Nat. io, p. 20 ; J. of C. 4, 

 p. 214). Wressle, a few mostly young in the Fleetdyke, 1884 (G.R.) ; 

 Wressle, " this being at present the only really Yorkshire habitat 

 known'' (Wm. Nelson, J. of C. 5, pp. 262-67). A' 1 "exhibition of 

 P. contecta from East Yorks. sent by Albert Harker," Conch. Soc. 

 51 h June, 1889, is recorded (J. of C. 6, p. 101) without any reference 

 to localities. 



Viviparus viviparus (Linn.). 



Derwentland. — In the Ouse at Selby, numerous fine examples on the mud 

 where clear of weeds before reaching Barlby (Y.N.U. 1875). 

 York (Hincks, Ann. Nat. Hist. 5, ser. I., p. 367, 1S40) ; I have 

 taken two or three specimens in the Ouse (S.W.N.) ; profusely 

 abundant in the Ouse below York (W.C.H.) ; below the city it 

 abounds (R.M.C.). 



Holderness. — Foston, near Driffield, exhibited at the Conch. Soc. for Mr. 

 L. B. Ross (J. of C. 4, p. 356). Dead specimen from highwater 

 mark at Bridlington (G. Wingate, J. of C. 4, p. 365). Three dead 

 shells found on the bank of the Beverley and Barmston drain at 

 Figham in the mud thrown out in cleaning the drain (H. M. Foster, 

 Jan., 1885). As one branch of the Barmston drain enters the sea at 

 a few miles south of Bridlington, it is probable that all these dead 

 shells were derived from colonies in the Driffield neighbourhood, 

 though its occurrence there requires confirmation. 



Bythinia tentaculata (Linn.). 



Derwentland. — York, abundant everywhere (S.W.N.). River Ouse, 

 near Selby (Y.N.U. 1875). Derwent at Kirkham Abbey (Y.N.U. 

 1889). Howden (N. & T. ). Newsholme and Wressle, very common 

 (G.R.). Pocklington canal (Y.N.U. 1893). Breighton (J.D.B. 

 circular 75). 



Wolds.— Burlington (J.S.G.). Londesborough (J.D.B. circular 75). 





