MOLLTISCA. 327
Benson, W. H.— Notes on Plectopylis, a group of BJelicidse distin- guished by several internal plicate Epipkragms, with the Charac- ters of a new Species. Ann. Nat. Hist. vi. p. 213.
Notes on lantliina, Bolten ; and Indication of a new Species
of the allied Oceanic Genus, Beclusia, Petit. A. N.H. 3 ser, vi. p. 405.
Binney, W. G-.— The Terrestrial Air-Breathing Mollusks of the United States and the adjacent Territories of North America. Vol. IV. 4 col. plates, 8vo. Boston.
Notes on American Land Shells, No. 6. Phil. Acad. Proc.
1S60, p. 150.
Descriptions of new Species of Pulmonata, in the Collection
of the Smithsonian Institution. Phil. Acad. Proc. 1860, p. 154.
Bourgignat, J. E. — Monographic du genre Choctnomplialos. 2 platen Rev. d. Zool. 1860, p. 507.
■ Catalogue des Mollusqnes de la famille des Paludinees re-
cueillis en Siberie et sur le territoire de l'Ainur. Rev. de Zool. 1860, p. 531.
Collingwood, Cuthbert. — On the Nudibranchiate Mollusca in- habiting the estuary of the Dee. Ann. N. H. 3 ser. vi. p. 196.
Damon, Robert. — List of Mollusca found in the neighbourhood of Jerusalem. Ann. N. Hist. 3 ser. vi. p. 312.
Foster, Michael.— On the Beat of the Snail's Heart. Rep. Brit. Ass. 1859 (Trans. Sect. p. 160).
Garner, Robert. — On Reproduction in Gasteropoda, and on some curious Effects of Endosmosis. Rep. Brit. Ass. 1859 (Trans. Sect. p. 162).
Gerstfeldt, G. — Ueber Land-u. Siisswasser Mollusken Sibiriens u. d. Amurgebietes. plate, 4to. Petersb. 1860.
Gray, J. E. — On the Bitentaculate Slug from Aneiteum. Ann. N. H. 3 ser. vi. p. 195.
On the Arrangement of the Land Pulmoniferous Mollusca
into Families. Ann. N. Hist. 3 ser. vi. p. 267.
GuisCARDi, G. — Un nuovo genere di molluschi della famiglia delle Neritide. Nap. Mem. II. Vien. Sitz. 60.
Heynemann, E. D. — Limax variegatus Drap. Beitrag z. deutschen Molluskenfauna. plate. Mai. B. iv. p. 165.
Jeffreys, J. Gwyn. — On the Mollusca of the Upper Harz. Ami. N. Hist. 3 ser. vi. p. 318.
Kefersteen", "W. u. E. Ehlers. Beitrage z. Ivenntniss d. Geseh- lechtsverhaltnisse v. Helix pomatia. plate. Zeitschr. w. Z. x. 2.
Krohn, A. — Beitrage zur Entwickelungsgeschi elite der Pteropoden u. Heteropoden. 2 plates. 4to. Leipz.
Krohn, Aug. — Ueber die Schale und die Larven cles Gastcropteron Meclcelii. (plate). Wigm. Arch., 1860, p. 64.
Lacaze-Duthiers. — Notes respecting the circulation of Gasteropo- dous Mollusca and the supposed aquiferous apparatus of the Lamellibranchiata. Roy. Soc. Proc. x. p. 193, 196. vol. i. — n. h. r. 2 u