Volume 13 Number 12 (April 2, 1900)
- B. WALKER. The genuine Planorbis corpulentus Say: 133–138
- B. H. WRIGHT. New southern unios: 138–139
- H. A. PILSBRY. Notes on some southern Mexican shells: 139–141
- C. W. JOHNSON. Some notes on the land shells of western Florida: 141–143
- F. W. BRYANT. Epiphragmophora harperi n. sp.: 143–144
- H. A. PILSBRY. A new N.E. Australian amnicoloid: 144
Volume 13 Number 11 (March 1, 1900)
- W. H. DALL. Note on Petricola denticulata Sby.: 121–122
- F. W. BRYANT. Description of a new Californian land shell: 122
- THE JOURNAL OF CONCHOLOGY. The corrosion of shells in cabinets: 122–127
- H. A. PILSBRY. Note on the varieties of Epiphragmophora mormonum: 128
- H. A. PILSBRY. A new Calliostoma from Florida: 128–129
- General notes: 129–131
- Publications received: 131–132
Volume 13 Number 10 (February 8, 1900)
- L. S. FRIERSON. A new Alabama Unio: 109–110
- H. A. PILSBRY. Species of Chlorostoma of southern and eastern Patagonia: 110–112
- F. C. BAKER. On a collection of fresh-water shells from Rhode Island: 112–113
- A. B. KENDIG. John H. Thompson, Ph.D.: 113–114
- H. A. PILSBRY. New species and subspecies of American land snails: 114–115
- R. E. C. STEARNS. Field notes and reminiscences: 115–117
- C. W. JOHNSON. Some notes on Rumina decollata Linn.: 117
- General notes: 117–118
- Publications received: 119–120
Volume 13 Number 9 (January 2, 1900)
- B. WALKER. Changes with growth of Lithasia obovata (Say): 97–98
- H. A. PILSBRY. Note on Thysanophora hornii Gabb: 98–99
- W. H. DALL. A new species of Capulus from California: 100
- R. E. C. STEARNS. Mollusca associated with Mastodon remains: 100–101
- F. W. KELSEY. Dredging in San Diego Bay: 101–102
- O. O. NYLANDER. A list of shells from northeastern Maine: 102–106
- H. A. PILSBRY. Some Zonitidae collected by J. H. Ferriss in Arkansas and the Choctaw Nation: 107
- H. A. PILSBRY. A new American land shell: 107–108
Volume 13 Number 8 (December 7, 1899)
- W. H. DALL. Note on Sigaretus oldroydii: 85
- R. E. C. STEARNS. Modiola plicatula Lamarck in San Francisco Bay: 86
- E. R. SYKES. Note on the Clausiliae of Celebes: 86–87
- C. T. MITCHELL. Notes on the Mollusca of Canandaigua Lake Region, N.Y.: 87–89
- B. H. WRIGHT. New southern unios: 89–90
- V. STERKI. Pisidium handwerki n. sp.: 90–91
- W. H. DALL. Origin of the mutations of Ostrea: 91–93
- G. H. CHADWICK. An attempt to define the natural groups of Strombus: 93–96
Volume 13 Number 7 (November 3, 1899)
- R. E. STEARNS. Donax stultorum, Mawe=Conrad’s species, Cytherea crassatelloides: 73–75
- B. H. WRIGHT. New southern unios: 75–76
- G. H. CHADWICK. An attempt to define the natural groups of Strombus: 76–78
- H. A. PILSBRY. Note on some new Mexican shells: 79
- L. S. FRIERSON. Among the unios of the Sabine River: 79–81
- R. E. C. STEARNS. Abalone fishery in California - protective regulation: 81–82
- Correspondence: 82–83
- General notes: 84
- Publications received: 84
Volume 13 Number 6 (October 2, 1899)
- Anonymous: William D. Hartman, M.D.: 61–63
- H. A. PILSBRY. Mollusks collected by R. C. McGregor in northern California: 64–67
- C. W. JOHNSON. A new Pliocene Polygyra from Florida: 67–68
- F. BURNS. Viviparous Miocene Turritellidae: 68–69
- B. H. WRIGHT. New southern unios: 69–70
- General notes: 70–71
- Publications received: 71–72
Volume 13 Number 5 (August 31, 1899)
- H. A. PILSBRY and T. D. A. COCKERELL. Another new Ashmunella: 49–50
- B. H. WRIGHT. New southern unios: 50–51
- H. A. PILSBRY. Planorbis rubellus Sterki and P. harni Pilsbry: 51–52
- E. J. POST. Collecting on the Gulf Coast of Florida: 52–54
- G. H. CHADWICK. Notes on Polygyra appressa: 54–55
- B. WALKER. Supplemental note on the Mollusca associated with the Mastodon in Berrien County, Michigan: 55
- H. A. PILSBRY. New Jamaican forms of Lucidella: 56–57
- F. C. BAKER. Notes on the Mollusca of Owasco Lake, N.Y.: 57–59
- O. O. NYLANDER. Agassiz Association Department: 59–60
- General notes: 60
Volume 13 Number 4 (July 31, 1899)
- H. A. PILSBRY. New southwestern forms of Polygyra: 37–41
- G. H. CLAPP. Notes on two varieties of Pyramidula (Patula) alternata (Say): 41–42
- B. H. WRIGHT. New southern unios: 42–43
- S. N. RHOADS. Annotated list of land and fresh-water shells recently collected in the vicinity of Miami, Florida: 43–48
- General notes: 48–49
Volume 13 Number 3 (June 29, 1899)
- P. B. RANDOLPH. Epiphragmorphora fidelis Gray: 25–27
- H. N. LOWE. Dredging off San Pedro: 27–30
- F. C. BAKER. Notes on the mollusks of Lilycash Creek: 30–31
- B. H. WRIGHT. New southern unios: 31
- T. D. A. COCKERELL. Variations of Helix hortensis at Rockport, Mass.: 32
- H. A. PILSBRY. Dr. Babor’s rediscovery of Aspidoporus: 32–34
- Anonymous. Agassiz Association Department: 34–35
- General notes: 36
Volume 13 Number 2 (June 3, 1899)
- E. H. ASHMUN. Collecting in Arizona and New Mexico: 13–17
- C. F. ANCEY. Descriptions of new land shells from South America: 17–19
- R. E. C. STEARNS. Natural history of the Tres Marias Islands, Mexico: 19–20
- H. A. PILSBRY. New Amnicolidae from Florida: 20–22
- B. H. WRIGHT. New southern unios: 22–23
- Anonymous. Agassiz Association Department: 23–24
- General notes: 24
Volume 13 Number 1 (May 6, 1899)
- A. W. HANHAM. A list of the land and fresh-water shells of Manitoba: 1–6
- B. H. WRIGHT. New southern unios: 6–8
- R. E. C. STEARNS. Crepidula convexa Say, var. Glauca Say, in San Francisco Bay: 8
- W. E. COLLINGE. On the occurrence of Arion fasciatus Nils., in America: 9
- V. STERKI. Pisidia new to our country, and new species: 9–12
- General notes: 12
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