THE NAUTILUS. 59 



Unio viridis Conrad (as of Rafinesque), Monography, 1836 : 

 Synopsis 1853. 



Unio tappanianus Lea, 1836. 



Symphynota viridis Simson, 1900, (as of Conrad /) ; also in 

 Catalog, 1914. 



LASMIGONA VIRIDIS (Rafinesque). 



Unio viridis Rafinesque, Monograph, 1820. 



Symphynota compressa, Lea, 1829. 



Complanaria alasmodontina, Stimpson, 1851. 



Margaron pressus Lea, 1852. 



Symphynota compressa Lea, Simpson, 1900 and 1914. 



Because of the Symphynota of Lea being an exact synonym 

 for Rafinesque's genus Proptera, and the earlier use (in Unio) of 

 the name compressus, neither the name compressa nor pressus, can 

 be used, and if Rafinesque's name be disallowed by the weak- 

 kneed, Sampson's name takes precedence. 



PUBLICATIONS RECEIVED. 



THE NAIADES or MISSOURI. By William I. Utterback, pub- 

 lished in the American Midland Naturalist, Notre Dame, Ind. 

 Vol. iv, 1915. In the May number the first part of this paper 

 appeared. It consisted of 13 pages, containing an introduction 

 with a general key to the families and genera. The July num- 

 ber contains part ii, comprising 56 pages covering the Margari- 

 tanidae, genus Cumberlandia and the Unionidae, genera Fus- 

 conaia, Amblema, Megalonaias N. gen. Type, Unio heros Say, 

 Quadrula and Rotundaria, With the July number was a supple- 

 ment containing 28 plates illustrating the species, collecting 

 grounds etc. The paper is to be continued. C. W. J. 



THE PHILIPPINE LAND SHELLS OF THE GENUS CHISTOLOMA. 

 By Paul Bartsch, (Proc. U. S. Nat. Mus., Vol. 49, pages 195- 

 204, pi. 15.) A new subgenus Hololoma, type Megalomastoma 

 quadrasi Hidalgo, and seven new sub-species are described. 



THE RECENT AND FOSSIL MOLLUSKS OF THE GENUS RlSSOINA 



FROM THE WEST COAST OF AMERICA. By Paul Bartsch, (Proc. 



