NOTICES OF BOOKS. 285 



Lichens of the late Pastor Sch.erer. 



M. Guthnick, Director of tlae Botanic Garden at Berne, has written 

 to inform me that the private collection of Lichens, belonging to the 

 late Pastor Schserer, has been sold to M. E. Boissier of Geneva. 



He states that there still remain for sale the collections which served 

 as the basis of Schaerer's ' Lichenes Helvetici Exsiccati/ amounting to 

 650 species or varieties^ of each one of which, with the exception of _a 

 few, there are from ten to fifty specimens. 



This rich collection has been valued by Mr, Shuttleworth and himself 

 at 1500 French francs^ which he considers ^^ heaxicoiip an dessousde leur 

 taleur^^ and at which sum he offers it for sale, wth the probability of 

 some small abatement from the price. He is desirous that a number 

 of British botanists should join together to purchase, and is open to 

 offers. 



M, Guthnick also states that he can supply Schserer's Lich. Helv. 

 Exsic, 13 volumes, at 12 French francs per volume. 



W. A. Leighton. 



NOTICES OE BOOKS 



United States Exploring Expedition. Botany. Phanerogamia ; 5y Dr. 

 Asa Gray, M.D,, wit/i a Folio Atlas of 100 plates. Vol. L Large 

 4to. New York. 1854. 



Such is the title of the first volume, long anxiously expected, of the 

 Botany of the United States Exploring Expedition, during the years 

 1838-1842, under the command of Captain Charles Wiiks, U.S.N. In 

 our second volume of this Journal, p. 383, we mentioned that Dr. Asa 

 Gray, the distinguished Professor of Botany at Harvard University, 

 U.S.A., was then (1852) on a visit to Europe, for the purpose of in- 

 specting the various Herbaria which might assist him in so- important 

 an undertaking : and well did he employ his time in that investigation. 

 The volume of text now before us (for the plates are not yet published) 

 commences without introduction or preface, and terminates with the 

 Araliacece, following the arrangement of Ue Candolle. We may form, 

 however, some idea of the importance of this work when completed, by 



