26o 



BIBLIOGRAPHY: MOLLUSCA, 1886-87. 



George Roberts. York S.W. 



Garden Slugs [at Lofthouse, near Wakefield, are Arion nter, A. Jiortensis ; and 

 at Wakefield, Liniax agrestis var. nigi-a\ Sci. Goss. , May and June 1886, 

 pp. 1 18 and 140. 



Geo. Roberts. Lane. S. 



Lancashire Helices [referring to published notes and lists, as Cockerell's, 

 Standen's, and Dyson's, mentioning species, and urging publication of detailed 

 and further information]. Nat., June 1886, p. 163. 



George Roberts. York S.W. 



Arion subfuscus and Helix hispida var. fusca in Yorkshire [at Lofthouse, 

 near Wakefield, June 2nd, 1886]. Zool., Aug. 1886, x. 341. 



George Roberts. York S.E. 



MoUusca of Wressle and neighbourhood [being a full and detailed list — 

 with localities — of twenty-one fresh-water mollusca, two slugs, and fifteen land 

 mollusca, besides numerous named varieties]. Nat., Oct. 1886, pp. 311-314. 



Geo. Roberts. York S.W. 



Planorbis complanatus var. submarginata in Yorkshire [at Sharleston near 

 Pontefract]. Nat., Nov. 1886, p. 347. 



Geo. Roberts, York S.E. 



Addition to Wressle List of Mollusca [of Sphicrinm comae /n var. regularis 

 Pasc.]. Nat., Nov. 1886, p. 347. 



George Roberts. York S.W. 



Supplementary Notes on the Mollusca of Pontefract and Neighbour- 

 hood [in which Sphce^'iutn, Pisidium^ Planorbis, Bythinia, Fhysa, Lininaa, 

 Arion, Liniax, Succinea, Helix, Claiisilia, and Achatina are treated of, the 

 notes chiefly dealing with Varieties not included in the author's former papers]. 

 Zoo]., Nov. 1886, X. 448-453. 



George Roberts. York Mid W., York S.W., Lane. S. 



Notes on Varieties of Bythinia tentaculata [with descriptions of monst. 

 scalarifornie, Milford near Pontefract, var. major Loc, Fairburn and Bradford, 

 var. nov. angiilata, canal near Bradford, var. 1 pj'oducta Menke, Fairburn, 

 var. zonata Baud., near Bradford, var. fulva Loc, Apperley near Bradford, 

 and monst. dccollaiiiin Jeff., Kirkthoi-pe near Wakefield, near Bradford, and 

 at Prestwich]. Nat., Jan. 1887, pp. 19-20. 



George Roberts. York Mid W., York S.W. 



Arion flavus [at Harrogate and at Wakefield]. Sci. Goss., Nov. 1887, p. 260. 

 [These were doubtless juvenile specimens of one of the other Arions, Arion 

 flavns being merely a name, a myth. — W.D.R.] 



George Roberts. York N.E. 



Planorbis Nautileus var. [from Scarborough, the smooth form]. Sci. Goss., 

 Nov. 1887, p. 260. 



Wm. Denison Roebuck. Durham. 

 Slugs in County Durham [collected by Baker Hudson at Durham ; Liviax 

 arboritm. L. maxinuis var. ccUaria, L. ag7rstis and vars. sylvalica, albida, and 

 tristis, Arion aier vars. rtifa and niarginata, and A. Jiortensis ; and Limax 

 ai'boruni from ]\Iiddleton-in-Teesdale]. Nat., Aug. 1884, p. 20. 



[W. Denison Roebuck.] York N.W. 



The Yorkshire Naturalists' Union at Hawes [28ih June, 1884; Limax hivis, 

 L. nrboriim, Succinea pnti'is, ZoJiiics fulvus, LLc/ix scricea, Clansilia laminata, 

 C. dnbia, Azeca, and Anodonta anatina mentioned, with localities]. Nat., 

 Aug. 1884, p. 18. 



W. D. Roebuck. York Mid W. 



[Limax maximus, type, Headingley, Leeds]. Joum. of Conch., Jan. 1885, 

 iv. 260. 



Naturalist, 



