Contents of Volume 51 (1937–1938)

• W. J. CLENCH. A new species of Oliva from Santo Domingo, with notes on other marine forms: 109–114
• H. BEQUAERT and W. J. CLENCH. A new subspecies of Solaropsis gibboni from Brazil: 115
• H. A. PILSBRY. On the history and status of Lora Gistel: 115–118
• W. O. GREGG. Pecten pugentensis at Newport Bay, California: 118–119
• C. C. CHURCH and A. G. SMITH. A giant race of Helminthoglypta from Tulare Co., California: 119–122
• W. J. EYERDAM. Extended ranges of north Pacific shells: 122–126
• F. C. BAKER. New land and freshwater Mollusca from the Upper Pliocene of Kansas and a new species of Gyraulus from Early Pleistocene strata: 126–131
• L. HUBRICHT. A new Anguispira from Kentucky: 131
• H. VAN DER SCHALIE. On the occurrence of Helix lactea Müller in North America: 132–134
• H. VAN DER SCHALIE. Remarks on some of Dr. Paul Bartsch’s experiments: 134–135
• A. F. ARCHER. A new species of Polygyra from the Great Smoky Mountains, North Carolina: 135–137
• J. OUGHTON. Notes on Hygromia striolata (Pfr.) at Toronto, Canada: 137–140
• H. E. WHEELER. Additional data on copies of Say’s American Conchology: 140–141
• Anon. Dr. Emmet Rixford: 141–142
• W. J. CLENCH. Robert Swift: 142–143
• Notes and news: 143–144

• H. A. PILSBRY and T. MCGINTY. Review of Florida Chamidae: 73–79
• A. G. SMITH. Three new subspecies of Helminthoglypta arrosa (Gould): 79–85
• H. B. BAKER. Nomenclature of Onchidiidae: 85–88
• M. SMITH. Further notes upon tertiary and recent mollusks from Florida, with descriptions of new species: 88–91
• H. E. WHEELER. Notes on American Conchology by Thomas Say, with special reference to the seventh part, edited by T. A. Conrad: 91–97
• T. D. A. COCKERELL. Junius Henderson: 97–99
• W. J. EYERDAM. Extended ranges of seventy-five species of north Pacific shells collected by Walter J. Eyerdam and Ingvard Norberg: 100–104
• Notes and news: 104–108

• H. A. PILSBRY. Aurinia torrei, a new Cuban volute: 37–38
• H. C. FULTON. Notes on the recent Spondylus of Florida: 38–39
• E. A. ANDREWS. A dense aggregation of snails: 39–42
• H. E. WHEELER. Notes on American Conchology by Thomas Say, with special reference to the seventh part edited by T. A. Conrad: 43–50
• H. J. VAN CLEAVE and T. D. FOSTER. The seasonal life history of a land snail, Polygyra thyroidus (Say): 50–54
• A. M. STRONG. A new Turbonilla from Monterey Bay, California: 54–55
• A. F. ARCHER. Some land mollusks of three counties in eastern Ohio: 55–60
• E. P. CHACE. A new race of Helminthogypta traski from lower California: 60–61
• A. F. ARCHER. Helix pomatia Linné in Jackson, Michigan: 61–63
• W. J. EYERDAM. Monadenia semialba Henderson: 63–65
• M. SMITH. Further notes upon tertiary and recent mollusks from Florida together with descriptions of new species: 65–68
• Anon. The seventh annual meeting of the American Malacological Union of the Museum of Zoology, University of Michigan, August 3 to 5, 1937: 68–71
• Notes and news: 71–72

• W. M. INGRAM. Cypraeidae from Christmas, Palmyra, Washington, and Fanning Islands: 1–3
• P. BARTSCH. A new west American cone: 3–4
• A. M. STRONG. Notes on West Coast Epitoniidae: 4–8
• B. F. HOWELL and H. G. RICHARDS. The fauna of the “Champlain Sea” of Vermont: 8–10
• G. D. HANNA and A. G. SMITH. Some notes on an old race of California land snail with descriptions of three new forms: 10–17
• W. J. CLENCH. Notes on three rare American Polygyra: 17–18
• W. J. CLENCH. A new variety of Bulimulus dealbatus from Alabama: 18–19
• W. J. CLENCH. Three new species of Cerions from Long Island, Bahamas: 19–23
• F. C. BAKER. A new Pleistocene race of Polygyra appressa: 23–24
• H. A. PILSBRY and T. D. A. COCKERELL. A new Bolivian helicoid, Dinotropis harringtoni: 24–25
• G. WILLETT. A new Callistochiton from lower California: 25–26
• H. A. PILSBRY. The races and allies of Pleurodonte guadeloupensis: 26–28
• S. S. BERRY. Some lesser races of Monadenia fidelis (Gray): 28–33
• Notes and new: 33–36