Contents of Volume 26 (1912–1913)

• A. W. HANHAM, DUNCAN. Notes on a few British Columbia marine shells: 133–136
• V. STERKI. Sphaeriidae, old and new, IV: 136–140
• L. S. FRIERSON. Some criticisms on Dr. F. Hass’ Monograph of the Unionidae: 141–142
• W. H. DALL. Shells collected at Manzanillo, West Mexico, Oct. 1910, by C. R. Orcutt, identified, by William H. Dall: 143–144
• Notes: 144

• E. W. PRESBREY. Collecting in Panama: 121–125
• H. A. PILSBRY. On some Cuban Urocoptidae: 125–130
• S. S. BERRY. A list of Mollusca from the Musselshell Valley, Montana: 130–131
• W. H. DALL. Charles W. Gripp: 132
• Notes: 132

• H. A. PILSBRY and J. B. HENDERSON, JR. Two new Cuban Urocoptidae: 109–110
• H. E. WHELLER. A collector in Western Cuba and the Isle of Pines (concluded): 111–114
• H. A. PILSBRY. New Japanese Ovulidae: 114–115
• F. C. BAKER. A new Lymnaea from Montana: 115–116
• W. F. CLAPP. Radix auricularia at Cambridge, Massachusetts: 116–117
• V. STERKI. Sphaeriidae old and new, III: 117–119
• Anonymous. F. W. Bryant: 119
• Notes: 119–120

• S. R. ROBERTS. New Cypraeidae: 97–99
• H. E. WHEELER. A collector in western Cuba and the Isle of Pines: 99–108
• Notes: 108

• C. HEDLEY. Conchological chat from London: 85–88
• H. A. PILSBRY. Two new American land shells collected by Messrs. Hebard and Rehn: 88–90
• F. A. SAMPSON. Shells of Southeast Missouri: 90–95
• V. STERKI. Sphaeriidae, old and new, II: 95–96
• Notes: 96

• H. W. WINKLEY. Notes on marine Mollusca: 73–74
• M. SMITH. On a collection of marine Gastropoda from Aden with descriptions of new forms: 74–79
• H. A. PILSBRY. Note on a variety of Polygyra fallax: 79–80
• J. HENDERSON. Mollusca from northern New Mexico: 80–81
• Anonymous: David Dwight Baldwin: 82–83
• A. W. HANHAM. George W. Taylor, D. D.: 83–84
• Notes: 84

• W. T. BARRET. The mussel shell beds need protection: 61–64
• V. STERKI. Fresh-water Mollusca living out of the water: 64–65
• C. DE LA TORRE. New Cuban Urocoptis of the U. cinerea group (concluded): 66–69
• Notes: 69–70
• Publications received: 71–72

• H. M. EDSON. Notes on the validity of Helix (Epiphragmophora) oregonensis Lea: 49–51
• A. E. ORTMANN. Lampsilis ventricosa (Barnes) in the Upper Potomac drainage: 51–54
• H. W. WINKLEY. New England notes: 54–55
• C. DE LA TORRE. New Cuban Urocoptis of the U. cinerea group: 55–58
• W. H. DALL. Note on the genus Septa Perry (Triton auct.): 58–59
• Notes: 59–60
• Publications received: 60

• H. EDSON. Two new land shells from California: 37
• L. E. DANIELS. Abnormal shells: 38–42
• H. A. PILSBRY and J. B. HENDERSON, JR. New Cuban land shells: I. Annularia and Chondropoma: 42–45
• C. HEDLEY and H. A. PILSBRY. Strange names for old acquaintances: 45–47
• A. A. HINKLEY. A new species of Anculosa: 47–48
• H. A. PILSBRY and C. W. JOHNSON. A new Floridian Viviparus: 48
• Notes: 48

• M. SMITH. Notes on the molluscan fauna of the Sierra Elvira, Spain: 25–27
• B. LONG. Lymnaea auricularia near Philadelphia: 27–29
• H. A. PILSBRY. A new Oreohelix from Colorado: 29–31
• E. G. VANATTA. Land shells of southern Florida: 31–34
• M. R. GAINES. A conchological museum: 34–35
• Notes: 35–36

• A. E. ORTMANN. Cumberlandia, a new genus of naiads: 13–14
• H. E. WHEELER. Addition to the list of Mollusca from Monte Sano, Alabama: 14–16
• E. G. VANATTA. Land shells of southern Florida: 16–22
• L. S. FRIERSON. Unio (Lampsilis?) purpuriatus Say: 22–23
• L. S. FRIERSON. Unio (Obovaria) jacksonianus, new species: 23–24
• Notes: 24

• H. A. PILSBRY. A new species of Amnicola: 1
• J. B. HENDERSON. A day’s collecting at Antilla, Cuba: 2–3
• H. B. BAKER. Notes on Circinaria concava (Say) from Sheboygan County, Michigan: 3–4
• H. H. SMITH. Rumina decollata in Mobile and New Orleans: 4–6
• V. STERKI. Sphaeriidae, old and new: 6–9
• J. HENDERSON. Oreohelix colonies in Colorado (concluded): 9–11
• H. A. PILSBRY. Notes on shells from Quirigua, Guatemala: 11–12
• Notes: 12