abstracts: conchology 135 



AGRICULTURE. — The use of soils east of the Great Plains region. 

 Milton Whitney. Bulletin Bureau of Soils, No. 78. Pp. 292, 

 PI. 1 (map), figs. 16. 



This is a comprehensive bulletin, embodying the results of the soil 

 surveys from their inception to January 1, 1910. All the soil types 

 established on or before that date are briefly described and their prin- 

 cipal uses stated. The soils are grouped in provinces and in classes, the 

 latter based upon textural similarity, and the natural crop adaptations 

 predicated broadly on this basis. The bulletin is divided into seven 

 principal sections, corresponding with the seven soil provinces, and 

 with each section is given a key to the classification of its soils, showing 

 diagrammatically the origin, processes of formation, and other salient 

 characteristics of the various soil series. A map of the soil provinces 

 of the eastern half of the United States showing the exact location of the 

 soil survey areas so far completed accompanies the volume. M. W. 



CONCHOLOGY. — The west American mollusks of the genus Eumeta 

 Paul Bartsch. Proceedings U. S. National Museum, 39: 565- 

 568, figs. 1-3. 1911. 



In this paper Eumeta intercalaris Carpenter, bimarginata, C. B. Adams, 

 and eucosmia, the last a new species, are described and figured. P. B. 



CONCHOLOGY. — The recent and fossil 7nollusks of the genus Diastoma 

 from the west coast of America. Paul Bartsch. Proceedings 

 U. S. National Museum, 39: 581-584. 1911. 



This paper is a monograph of the members of this genus occurring on 

 the west coast of America, all of the known species being described and 

 figured. The following are new: Diastoma chrysalloidea, oldroydoz 

 and stearnsi. P. B. 



CONCHOLOGY. — The recent and fossil mollusks of the genus Cerithi- 

 opsis from the west coast of America. Paul Bartsch. Proceedings 

 U. S. National Museum, 40: 327, pi. 36-41. 1911. 



This is a monograph of the west American members of this genus, 

 containing descriptions of the new sub-genera Cerithiopsina, Cerithiop- 

 sida and Cerithiopsidella. The following species are described as new : 

 Cerithiopsis (Cerithiopsis) fatua, oxys, carpenteri, abreojosensis, berryi, 

 galapagensis, cesta, stejnegeri dina, halia, aurea, (Cerithiopsina) necro- 

 politana, adamsi, (Cerithiopsida) diegensis, rowelli, (Cerithiopsidella) 



