- 176 - 



since 1891, vvith Descriptions of Three New Species [L. {Perkier- 

 nia) hesterœ, L. (Peristernia) jeaniœ, L. {Perislernia) photiformis 

 nii. s|»|»., Mauritius] (Figs.) — Geo. C. Spence. Note on Hélix 

 pomatia. — W. Gyngell. Lirnnœa pereger v. lacustris Leach 

 living without sheil. — W. Gyngell. An Interesling Associa- 

 tion of Species in W indermere. — W. Gyngell. Hélix aspersa 

 m. sinistror^um at Scarborough. — J. T. Marshall. Additions 

 to « British Conchology ». Part VII [Cerilhiopsis Barleei .Teffr. 

 var. intei'vupta n. var.J 



Tl»e i\autilus, a monlhly devoted to tlie inlerests of Con- 

 cliologists. Editors : H. A. Pilsbry and C. W. Johnson. 



Vol. XXV, n°l, May 1911. 



Contents : V. Sterki. Tlie Cardinal Teelli of Pisidium. — 

 V. Sterki. New Pisidia from Alabama [Pisidium albidum, 

 P. dispar, P. inornatum un. spp.]. — Walter F. Webb. A 

 vacation Trip to Cuba. — Dr. A. E. Ortmann. The Clas- 

 sification of the European Naiades. — H. W. Wlnkley. Boston 

 Malacological Club. — W. H. Dall. W. G. W. Harford (Obi- 

 tuary). — Notes : C. W. Johnson, Spondylus echinatus Martyn ; 

 — C. Goodrich, Lymnœa auricularia in Ohio ; — Pilsbry and 

 Vanatta, Polygyra monodon cava n. sub^p. 



Vol. XXV, n° 2, June 1911. 



Contents : H. A. Pilsbry. The Distribution of Oahuan Species 

 of Amastj-a. — Harry Edson. The Land Mollusca of San Mateo 

 Point, California. — L. E. Daniels. Notes on Oreohelix. — 

 VVra. H. Dall. A Giant Admete from Bering Sea [A. regina 

 11. SI».]. —Dr. a. E. Ortmann. The Classification of the Euro- 

 pean Naiades (Concluded). — Notes : T. D. A. Cockerell, Note 

 on Lymnœa florissantica. 



Vol. XXV, W 3, July 1911. 



Contents : Wm. H. Dall. A New^ Leptothyra from California 

 [L. Grippii n. sp.]. — G. W. Caffrey. TheMolluscan Fauna of 

 Northampton County, Pennsylvania. — L. S. Frierson. New Flo- 

 rida Unio [U. tenuisculus n. sp.] (PI. I, fig. 4-6). — Mrs. 

 M. Burton Williamson. Note on Tliais (Purpura). — H 'rold 



