252 AMERICAN JOURNAL 



NOTICES AND REVIEWS 



OF 



NEW CONOHOLOGICA.L WORKS 



BY GEO. W. TRYON, JR. 



I.— AMERICAN. 



Proceedings of the Academy of Natural Sciences of Philadelphia. 



No. 2, 18G8. 



Description of Nine Species of Vnionidce from Lake Nica- 

 ragua, Central America. By Isaac Lea. 



The author remarks the interesting fact that several of these 

 shells, like the Triquetra contorta of China and the African 

 Spatha Natalensis, are inequivalve. 



The following are the new species : — 



Unio Nicaraguensis, Anodonta incequivalva. 



** Granadensis, " Jewettiana. 



" encarpus, " lenticularis. 



" Gabbianus, " Granadensis. 



Anodonta Bridgesii. 



Description of Sixteen New Species of the Genus Unio of 

 the United States. By Isaac Lea. 



Unio Murray ensis, Georgia. Unio Lincecumii, Texas. 



" fascinans, Holston R.,Va. " corvinus, Geo., N. C. 



" sparus, N. Geo. " corvunculus, Geo. 



" Copei, Holston R., Va. " planior, Tenn., Hol- 

 " cyUndrellus, Tenn., Geo., ston R., Va. 



N. Ala. " vallatus, Alabama R. 



" difficilis, Geo., Holston R., " refulgens, Miss, 



Va. " Uhareensis, N. Car. 



" Topekaensis, Kansas. " sphosricus, Jackson, 

 " JBrazosensis, Texas. Miss. 



