NELSON AND TAYLOR : ON YORKSHIRE MOLLUSCA. 69 



23. Chalk IVo/cTs— Londesborough, Sept. 23rd, 1880, J.D.B. ; common in 



pond by railway, west side of Scarbro' line, near Bridlington, Aug. 

 1885, G. Wingate ! Ellerker, near Brough, June, 1878 ! Leckonfield 

 Moat, Sept. 4th, 1884, W.D.R. ! 



24. Holdeiness — Very abundant about Beverley ; at Figham, in a ditch, 



strongly impregnated with iron, J.D.B. , Jour. Conch., iii, p. 177; 

 also at Swinemoor and Long lane, but mostly small, the frequent 

 cleaning of the ditches preventing its arrival at maturity, J.D.B., 

 1. c, p. 293 ; ditch, near Wassand, Hornsea, J.D.B., 1. c. p. 137 ; 

 common about Hull, J.D.B., Nat., vol. iv., p. 71, Nov. 1878; 

 common at Hornsea Mere, June 6th, 1881, W.D.R. ! New Hol- 

 land near Meaux, May 29th, 1882, W.D.R. ! Dyke at Newland, 

 Hull, 2ist May, 1883! 



Var. inflata Moquin-Tandon. 

 Clessin refers the var. inflata of Moquin-Tandon to Flanorbts 

 bulla of Muller, with which name he supersedes the one it is 

 generally known by in England. 



7. Went Vale — Ackworth and River Went, J. Wilcock, 12th Report 



Wakefield Nat. Soc, p. 27, 1S83. 

 10. Colne — Canal near Huddersfield, J. Whitwham ! 



Var. curta Jeffr. 



A short-spired obese form has been characterized under 

 this same name Ijy Van den Broeck in the 'Ann. Soc. Mai. 

 Belg.', iv., p. 90, pi. 2, f 5 a. b., 1869. 



Helix bullaoidcs Donovan, which many authors have 

 refered to this variety, is in our opinion more correctly placed 

 under the var. oblonga. 

 7. Went Vale — Askern, H. Shaw, Jour. Conch., vol. iii., p. 286 ! 



Var. oblonga Jeffr. 



Helix bullaoides Donovan ! 



3. Vale of York — Numerous wilh type in a ditch near the Ouse, below 



York, 1886, R. Whitwell ! 

 7. Went Vale— Common \n the River Went at Ackworth, J. llebden, 



*Jour. Conch.', vol. i, p. 4, 1874! 

 13. Airedale — Thwaitc (late, near Leeds! 

 20. Lower Tees -Ditch, Acklam, im the trias, B. Hudson, 1883 ! 



