— 183 — 



de la faune paléarctique [Xerophila Choisyi, X. verminiana, 

 X. souirensis, Hélix Mawpasi, Archelix agadirensis, Ferussa- 

 (ia derenica nn. nn.]. — Hugh C. Fulton. On new species 

 of Hemiplecta and Xesta from the Xulla ( == Sulla or Su la) 

 Islands, with notes on otiher species from the samie locality 

 [Hemiplecta ambitiosa, Xesta rufostrigata nn. spp.| (Figs.). 

 — <r. K. Gude. Changes :n the classification of Hélices 

 àuring a quarter of a centu > (Presidential Address . 



The Nautilus, quartarly devoted to the i-nterests of 

 Conchoiogîsls. Editors : H. -A. Pilsbry and C.-W. John- 

 son. 



Vol. XXXV, n" I. July 1921. 



Contents: Calvin Goodrich. Hiver banriers tu aqualic 

 animais. — W. H. Dali,. A new Ghiton from Southern Bra- 

 /il [Typhlochiton Felipponei n. sp.'. -- Bryant Walker. 

 Wliat is the type of Aneylastrum Bourguignal ? • — Calvin 

 Goodrich. Anculosse nortb of the Alahama drainage. — - 

 T. I). A. Gogkerell. The Helieoid group Disculella Pilsbry 

 [Geomitra (Disculella) cenourensis n. sp.j. — Junius Hen- 

 derson. Oreohelix maculata n. sp. — H. W. Clark and 

 Samuel Stein. Glochidia in surface towings. — Ch. Torrey 

 •Simpson. Florida wesl coast Lit/uns. — Fr. C. Baker. New 

 forma of Pleistoeene Molhisks from Ellinoits [Amnicola lus- 

 trica gelida, Valvata tricarinata supracarinata nn. varr.]. 

 — A. E. Ortmann. Sonic Central American species of 

 Naïades, belonging or allied to the gémis EUiptio. — Noies : 

 C. W. Johnson. Oii rnjuring Oystars. 



La Directrice-Gérante : M"" H. Fischer. 



