OF CONCHOLOGY. 85 



Siam and China.* Monocondylo&a compressa, Unio Pazii, U. 



Laosensis, Monocondyloea Moulwtiana. 

 Central Africa. Unio Kirkii, U. Nyassaensis, U. Aferulus, 



Spatha (data, S. Nyassaensis^ S. modesta. 

 South Africa. Unio JVatalensis, Spatha Natalensis. 

 New South Wales. Unio Paramattcnsis. 



Proceedings of the Academy of Natural Sciences of Philadelphia. 



No. 2. For April and May, 18(J6. 



Description of Five New Species of the Genus Unio. By 

 Isaac Lea. 



Unio Siamensis, Siam. 

 " asperulus, " 



" pilatus, " 



" cvittatus, Bengal. 



" Strehelii, Vera Cruz, Mexico. 



Description of Two New Species of the Crenus LitTiasia. 

 By Isaac Lea. 



Lithasia cylindrica, Coosa River, Alabama. 

 " Wheatleyi, Cahawba " " 



No. 3. June, July and August, 1866. 



Contributions to the Palaeontology of Illinois and other 

 Western States. By F. B. Mbiiik and A. H. Worthen. 



Pteria Morganensis. Anomphalus, n. g., (Rotellidce). 



Dolabra Sterlingensis. AnompJuilus rotulus. 



3Iacrodon micronem.a. 3Iicrodoma, n. g., [Littorinidce ?) 

 Platyceras Icevigatum. " conica. 



■* " haliotoides. Ortlionema eoruca. 



" uncum. Trochita ? carhonaria. 



" CJtcstcrense. Platyschismalielicoides, Sowerbj? 



" suhplicatum. Pleurotomaria conoides. 

 " infundihulum. " Coxana. 



Metoptoma [Platyceras ?) um- " spironema. 



bella. " Valvatiformis. 



Polyphemopsis chrysallis. 3Iurchisonia inornata. 



Ncticopsis Littonana, var., Nautilus sulcatiis, Sowerby? 

 Cfenevievensis. " Rockfordcnsis. 



* Mr. Lea remarks of U. Pazii, " It will be observed that two habitats 

 (China and Siam) are given. I think it probable that they are from 

 China only." I have specimens labelled " Cambodia," and received from 

 Ml". B. M. Wright, a well-known dealer of London. I do not think it 

 will be found in China, as it belongs to a Siamese type of the geaus. 



