42 Cincinnati Society of Natural History. 
1830- ‘he Lea. Observations on the Genus Unio, ctc., by Isaac Lea, vols. 
i-xill., with 3 vols. of index. < Trans. Am. Phil. Soc. and 
Jour, Phila. Acad. Nat. Sci. 1830-1874. 
These and other papers by the same author, published through the 
same mediums, contain much valuable information upon American 
Shells. Also in Proceedings of Phila. Acad. of Nat. Sci., are to be found 
many papers bearing on Shells of Ohio, but lack of space precludes their 
separate treatment.—A.F.G. 
1830. Menke. Synopsis Methodica Molluscorum, etc., que in Museo 
Menkeano adservantur; cum synonymia critica et novarum 
speciarum diagnosibus, auctore Carolo Theodoro Menke, M.D. 
Pyrmonti, 1830. dito altera. 
14 American species enumerated, 9 of which are from Ohio, all of which 
are described as new, viz.: Physa 1, Paludina, 1, and Melania, 7.—A.¥.G. 
1830-(34?). Say. American Conchology, or Descriptions of North 
American Shells. Illustrated by colored figures from original 
drawings executed from nature, by Thomas Say. New Har- 
mony, Ind. 
Nos. i. to vi. were published 1830 to April 1834. No. vii. was published 
after Mr. Say’s death by Mr. Conrad without date. In the sixth number, 
“An attempt to exhibita synonymy of the Western North American 
species of the genera Unio and Alasmodonta is made.”—A.F.G. 
1831. RaFrinEesQue. Continuation of a Monograph of the Bivalve Shells 
of the river Ohio, and other rivers of the Western States: 
by C. 8. Rafinesque (published at Brussels, Sept. 1820). 
Containing 46 species, from No. 76 to 121. Including an 
appendix on some Bivalve Shells of the rivers of Hindostan, 
with a Supplement on the Fossil Bivalve Shells of the Wes- 
tern States, and the Tulosites a new genus of Fossils. Phila- 
delphia, Oct., 1831. 
In this paper the author makes a summary of the labors of earlier con- 
chologists who had described American shells prior to 1820, and of the 
writers who had given attention to the American shells subsequent to the 
appearance of his first paper. 
He inaugurates the following genera and subgenera: Of Unio—Epio- 
hlasma, Toxolasma, Bariosta, Obliquaria and Truncilla. Of Alasmodon— 
Lasmigona, Amblasmodon, Decurambis, Sulcularia, and Pterosyna to include 
A. complanata, Say. Of Anodonta, the subgenus Flexiplis.—A.F.G. 
