Volume 4 Number 12 (April 5, 1891)
- W. S. STRODE. Mollusks of Thompson’s Lake, Illinois: 133–134
- J. FORD. Description of new species of Anctus and Oliva: 134–136
- E. H. HARN. Western Pennsylvania shells: 136–137
- H. F. CARPENTER. Edible mollusks of Rhode Island: 137–139
- V. STERKI. On Pupa rupicola Say, and related forms: 139–143
- American Association of Conchologists: 143–144
Volume 4 Number 11 (March 4, 1891)
- R. E. C. STEARNS. Notes on the sculpture of American limnaeas, etc.: 121–124
- H. A. PILSBRY. Note on Goniobasis catenaria Say: 124
- S. H. WRIGHT. Unionidae of Ga., Ala., S.C., and La., in south Florida: 125
- H. A. PILSBRY. Notes on the classification of American land snails: 125–127
- H. A. PILSBRY. A new species of Arconaia: 127–128
- American Association of Conchologists: 128–131
- General notes: 131–132
- E. W. ROPER. Edward Richards Mayo, aged 82 years: 132
Volume 4 Number 10 (February 1, 1891)
- H. A. PILSBRY. Forms of American Carychium: 109–110
- C. T. SIMPSON. Notes on Mr. Hemphill’s catalogue: 110–112
- H. WINKLEY. Edible mollusks of Maine: 112–113
- W. J. FOX. List of Mollusca of Gloucester, Co., N. J.: 113–115
- F. C. BAKER. A catalogue of conchological abbreviations: 115–117
- American Association of Conchologists: 117–120
- General notes: 120
Volume 4 Number 9 (January 11, 1891)
- J. KEEP. Mollusks of the San Francisco markets: 97–100
- H. A. PILSBRY. A new species of limpet from Japan: 100–101
- J. H. CAMPBELL. Mollusca of the United States: 101–104
- American Association of Conchologists: 104–107
- General notes: 107
- Publications received: 107–108
Volume 4 Number 8 (December 22, 1890)
- E. W. ROPER. A new American Pisidium: 85
- G. W. WEBSTER. Notes on Florida Bulimuli: 85–87
- W. H. DALL. Conchological notes from Oregon: 87–89
- F. C. BAKER. A catalogue of conchological abbreviations: 89–91
- American Association of Conchologists: 91–95
- General notes: 95–96
Volume 4 Number 7 (November 7, 1890)
- J. FORD. A glance at the Academy of Natural Sciences of Philadelphia: 75–79
- C. T. SIMPSON. Notes on Bulimulus dormani W.G.B.: 79–81
- J. FORD. Description of a new species of Anctus: 81
- F. A. SAMPSON. Shells within city limits: 82
- American Association of Conchologists: 82–85
- General notes: 85
Volume 4 Number 6 (October 14, 1890)
- B. H. WRIGHT. Critical notes on the Bulimuli of Florida: 61–63
- L. G. YATES. A new variety of Helix: 63
- H. A. PILSBRY. Notices of new Amnicolidae: 63–64
- H. A. PILSBRY. A new species of Nanina: 64–66
- W. S. TEATOR. Eastern New York notes: 66
- C. R. ORCUTT. West American notes: 67–68
- American Association of Conchologists: 68–70
- H. F. CARPENTER. The shell-bearing Mollusca of Rhode Island: –71
- General notes: 71
- Publications received: 72
Volume 4 Number 5 (October 1, 1890)
- H. A. PILSBRY. Remarks on certain goniobases: 49–50
- V. STERKI. A few “nevers” for conchologists: 50–51
- L. G. YATES. A new variety of Helix carpenteri from Southern California: 51–52
- H. A. PILSBRY. Preliminary notices of new Amnicolidae: 52–53
- L. G. YATES. Cypraea spadicea: 54
- American Association of Conchologists: 54–56
- H. F. CARPENTER. The shell-bearing Mollusca of Rhode Island (continued): 56–59
- General notes: 59–60
Volume 4 Number 4 (August 5, 1890)
- H. A. PILSBRY. New United States Pupidae: 38
- E. W. ROPER. Notes on Sphaerium secure Prime: 39–41
- H. HEMPHILL. New varieties of western land shells: 41–43
- V. STERKI. A new Pupa: 44–45
- American Association of Conchologists: 45–46
- H. F. CARPENTER. The shell-bearing Mollusca of Rhode Island (continued): 46–47
- General notes: 47–48
- Publications received: 48
Volume 4 Number 3 (July 6, 1890)
- T. H. ALDRICH. A new Eocene fossil from Texas: 25
- H. HEMPHILL. New forms of western limniades: 25–27
- V. STERKI. Notes on some North American Pupidae with descriptions of new species: 27–28
- F. C. BAKER. Remarks on Urosalpinx perrugatus Conrad: 29–30
- C. R. KEYES. Preservation of color in fossil shells: 30–31
- M. L. LEACH. The Isaac Lea Chapter of the Agassiz Association: 31–32
- Anonymous. Strength of limpets: 32
- M. B. WILLIAMSON. Collecting chitons on the Pacific Coast: 32–33
- American Association of Conchologists: 33–35
- H. F. CARPENTER. The shell-bearing Mollusca of Rhode Island (continued): 35–36
- Publications received: 36
Volume 4 Number 2 (June 27, 1890)
- J. KEEP. The Haliotis: 13–15
- H. HEMPHILL. New varieties of Patula strigosa: 15–18
- V. STERKI. New forms of American Pupidae: 18–19
- G. W. DEAN. Distribution of Unionidae in the three Rivers, Mahoning, Cuyahoga, and Tuscarawas: 20–22
- H. F. CARPENTER. The shell-bearing Mollusca of Rhode Island: 22–23
- Publications received: 23–24
- General notes: 24
Volume 4 Number 1 (June 9, 1890)
- Anonymous. Editorial: 1
- H. HEMPHILL. An American Anadenus: 2–3
- H. A. PILSBRY. Two new species of U. S. land shells: 3–4
- C. W. JOHNSON. Annotated list of the shells of St. Augustine, Fla.: 4–6
- W. J. RAYMOND. Why does Prophysaon shed its tail?: 6–7
- V. STERKI. Notes on some North American Pupidae with descriptions of new species: 7–9
- American Association of Conchologists: 9–11
- Notes and exchanges: 11–12
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