Volume 21 Number 12 (April 4, 1908)
- H. A. PILSBRY. Notes on Plate XI: 133
- H. A. PILSBRY and J. H. FERRISS. A new Micrarionta from Arizona: 134–136
- B. WALKER. New species of Ancylidae: 138–140
- R. E. C. STEARNS. Clams and the earthquake: 141–142
- H. JACKSON, JR. The Mollusca of North Haven, Maine: 142–144
Volume 21 Number 11 (March 7, 1908)
- S. S. BERRY. Molluscan fauna of the San Bernardino Mountains, California: 121–123
- W. H. DALL. Subdivisions of the Terebridae: 124–125
- B. WALKER. New species of Ancylidae: 126–129
- G. H. CLAPP. Vitrea lewisiana n. sp.: 129–130
- Notes: 130–132
- Publications received: 132
Volume 21 Number 10 (February 3, 1908) [Issue mislabeled as vol. 22]
- N. W. LERMOND. Hygromia hispida (Linnaeus) in Maine: 109
- B. WALKER. On certain immature Anculosae: 110–117
- A. A. HINKLEY. A new species of Pyrgulopsis: 117–118
- L. S. FRIERSON. Notes on some Australian Unionidae: 118–119
- Notes: 119
- Publications received: 119–120
Volume 21 Number 9 (January 3, 1908) [Issue mislabeled as vol. 22]
- B. WALKER. Pomatiopsis robusta n. sp.: 97
- W. H. WEEKS. JR. A collecting trip at Northport, N.Y.: 98–99
- E. G. VANATTA. A list of the land shells of Lee County, Florida: 99–104
- S. ROUS. Cancellaria obtusa Desh.: 105
- Notes: 105–107
- W. H. DALL. Henry Vendryes: 107
- J. B. HENDERSON, JR. Some personal recollections of Henry Vendryes: 107–108
Volume 21 Number 8 (December 9, 1907) [Issue mislabeled as vol. 22]
- W. H. DALL. On a Cymatium new to the Californian fauna: 85–86
- L. S. FRIERSON. A new Mexican mussel, Lampsilis fimbriata: 86–87
- C. H. CONNER. The gravid periods of unios: 87–89
- T. D. A. COCKERELL. A new zonitoid shell from the Miocene, Florissant Colorado: 89
- V. STERKI. A new Californian Vertigo: 90
- Notes: 90–93
- Anonymous: Proposals for an American Conchological Society: 94–96
Volume 21 Number 7 (November 7, 1907)
- E. S. MORSE. Eyes of Helicodiscus lineatus: 73
- H. W. WINKLEY. Cape Cod notes: 74–75
- H. A. PILSBRY. A new species of Fluminicola: 75–76
- A. A. HINKLEY. Shells collected in northeastern Mexico (concluded): 76–80
- V. STERKI. Pelseneer’s Treatise on Mollusca: 80–83
- Anonymous: Frederick Stearns: 83–84
- L. P. GRATACAP. Sloman Rous: 84
Volume 21 Number 6 (October 10, 1907)
- B. WALKER. Notes on Planorbis - I: 61–64
- M. SMITH. Annotated list of the Mollusca found in the vicinity of La Jolla, San Diego Co., Cal. (concluded): 65–67
- J. L. BAILY, JR. Notes on the conchology of Pocono Manor, Monroe Co., PA: 67–68
- A. A. HINKLEY. Shells collected in northeastern Mexico: 68–72
- Publications received: 72
Volume 21 Number 5 (September 18, 1908)
- L. S. FRIERSON. Notes on some exotic Unionidae: 49–50
- S. S. BERRY. Molluscan fauna of Monterey Bay, California (concluded): 51–52
- F. C. BAKER. Two new species of Lymnaea: 52–55
- M. SMITH. Annotated list of the Mollusca found in the vicinity of La Jolla, San Diego, Co., Cal.: 55–59
- Notes: 59–60
- Anonymous: Angelo Heilprin: 60
Volume 21 Number 4 (August 16, 1907)
- J. H. FERRISS. A new subspecies of Polygyra multilineata: 37–38
- H. A. PILSBRY and A. A. HINKLEY. New land and fresh-water shells from Mexico: 38–39
- S. S. BERRY. Molluscan fauna of Monterey Bay, California (continued): 39–47
- Notes: 47–48
- Publications received: 48
Volume 21 Number 3 (July 6, 1907)
- A. A. HINKLEY. Description of a new Mexican Pachycheilus: 25–26
- H. A. PILSBRY. Descriptions of new Mexican land shells: 26–29
- R. E. C. STEARNS. In re Cytherea petechialis of Carpenter’s Mazatlan: 29
- R. E. C. STEARNS. The U. S. Coast survey expedition to Alaska in the year 1867: 29–31
- V. STERKI. A few notes on Say’s early writings and species: 31–34
- S. S. BERRY. Molluscan fauna of Monterey Bay, California (continued): 34–35
- Notes: 36
- Publications received: 36
Volume 21 Number 2 (June 12, 1907)
- J. B. HENDERSON. A new Polygyra from North Carolina (P. soelneri): 13
- B. WALKER. Notes on Gundlachia I: 14–17
- S. S. BERRY. Molluscan fauna of Monterey Bay, California: 17–22
- W. H. DALL. A new Cerithium from the Florida Keys: 22–23
- R. E. C. STEARNS. Among the cephalopods: 23
- Publications received: 23–24
- Notes: 24
Volume 21 Number 1 (May 13, 1907)
- H. JACKSON, JR. The differences between the two New England species of Acmaea: 1–5
- A. H. NORTON. Pulmonates of the Matinicus Islands, Maine: 5–6
- J. B. HENDERSON. A list of land and fresh-water shells of Yemassee, South Carolina: 7–8
- T. H. ALDRICH. Some new Eocene fossils from Alabama: 8–11
- W. K. BROOKS. The origin of the lung in Ampullaria: 11–12
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