The Nautilus, a quarteiiy devoted to the interrsts of 

 Conchologists. Editors : H. A. Pilsbi y and C. W. Johnson. 



Vol. XXXI, n° 3, January 19 IS. 



Contents : Geo. H. Clapp. New Southern Forms of Canj- 

 chium and Thijsanopliora [Carychium exiguum floridanum 

 n. subsp., Miami, Fia.; Thysanophora MacnciUi n. sp., Mobile, 

 Ma.] (PI. VIII). — A. B:. Ortmann. The Anatomy of two 

 African Naiades, Unio caffer and Spatha Wahlberyi. — 

 H. .\. Pii.sBRY. A New Cuban Zachryxia [Z. Ramsdeni n. sp.J 

 (PI. VII). — H. A. PiLSBRY. Reichenbach's Zoologie. — Franx 

 C. Baker. Further Notes on the Mollusca of Oneida Lake, 

 New York : The Mollusks of Power South Bay — 

 H. A. PiL.SBRY and Jas. H. Ferriss. New Land Shells frorn 

 California and Nevada [Epipliragmopliora callisloderma n. sp., 

 Cal.; Oreohelix Handi n. sp., Nevada]. — T. S. Oi.droyd. 

 A Sunnner's Collection at P'riday Harbur, Washington. — 

 PP A. PiLSBRY and Elizabeth L. Bryan. Notes on some 

 Ilawaiian Species of Drupa and othcr Shells [Drupa Walkei'ir, 

 n. sp., Ilonoliilu; Perislcniia TluKunnni n. sp., id.j (Pi. IX). 



— E. 1'. Ch.'VCE. Pist of Shells colleded at Anaheim Bay and 

 Vicinity. — Lillian Dyer Thompson. A Horne-made Vivarium. 



— Notes : Manly D. Barber, Hélix nemoralis in Knoxville, 

 Tenn ; — C. W. Johnson, Viviparus malleatus and conlec- 

 loides in Massachusetts; — T. D. A. Cockerell, Polygyra 

 albolabris maritlma in Massachusetts 



Vol. XXXI, n° 4, April 1918. 



Contents : H. E. W'HEEi.Eii. The Mollusc.i nf Clark County, 

 Arkansas. — H. A. Pilsbrv. Descriptions of Xew Specios of 

 Mopalia [M. Lowei n. sp., California, M. iinporcala lionolus 

 n. subsp., Cal., M. inusco.sa Ucrior n. subsp., Wasli.] and 

 Tracliydcnnon [T. Lowei n. sp., Cal.]. — A. E. Ortmann. The 

 Identily of the Naiad Genus Nudviarin Omrad vvith Unio 

 Rctzius. — Silas C. Wheat. 71ie Genus Elysiella (V'errill or 



