BIBLIOGRAPHY OF 1872. 149 



Gabb (Wm. M.)— Notes on the Genus Polorthrus, Gabb. 



— Proc. Acad. Nat. Sci. Philad. 1S72, pp. 259 to 262 &pl.viii. 



Gabb (Wm. M.) — Notice of a Collection of Cretaceous 

 Fossils from Chihuahua, Mexico. — Proc. Acad. Nat. 

 Sci. Philad. 1872, pp. 263 to 265, and plates 9, 10, 11. 



Thirteen species named. Two are described and figured — 



Ammonites Giiadahipce, Roem., diWd Li7Jia Kimball i\ Gabb, nov. sp. 



Gabb (Wm. M.) — Description of some new genera of 

 molJusca. — Proc. Acad. Nat. Sci. Philad. 1872, pp. 270 to 

 274 and plates. 



Diagnoses published in advance of a more extended paper 



on W, Indian moUusca in preparation. The new genera are 



Planorbella {Limacinidce), Mctidella {Muricidce), Glyphostoma 

 {Tiirrid(z), Edracheliza [Buccinida:), Plochelcea [Olividce), lopsis 

 {EulimidcE), Ortliaidax and Dolophajies i^Stromaidd), Adceonidea 

 {Actceojiidce), Cylichnella (Buliidce), Bothrocoj'bida ( Corbulidce) and 

 Neceromya {Anatinidce). 



Byrnes (R. M.) — List of Land and Freshwater Shells 

 found in the vicinity of Cincinnati; also, the 

 Unionidag of the Ohio River and its Northern 

 Tributaries within the State of Ohio. — Dec. 1872, 3 pp. 



Two hundred species are given in this label list, of which 



90 are Unionidce. 



Journal de Conchyliologie. — Index general et system- 

 atique des matieres contenues dans les vingt 

 premiers volumes du J. de C., public's sous la direction 

 de MM. Crosse, Fischer, Bernardi, et Petit de la Saussaye, 

 1850 — 1872. — 8vo., Paris, 1878, pp. 200. 



After an introduction reviewing the progress of the various 



departments of malacology since the foundation of the Journal, the 



present editors give : first, a table of authors alphabetically arranged, 



with the titles of their papers; and secondly an index of the 



species of molluscs described or cited. To all possessors of the 



series of volumes these indices will be of great service, and they 



