606 THE AMERICAN NATURALIST. |. [Vor. XXXV. 
of an interesting subject, and, like his earlier work, is illustrated by 
process reproductions of well-chosen photographs. 
An ingenious door device for herbarium cases is described and 
figured in the report of the Director of the Field Columbian Museum 
of 1899-1900, recently issued as Publication 52 of that institution. 
The vexed question of the preservation of herbarium specimens by 
impregnation with poisons is rediscussed by Paiche in No. 3 of the 
current volume of the Bulletin de P Herbier Boissier. 
A biographic sketch of J. G. Agardh, by Magnus, is published in 
the JVaturissenschaftliche Rundschau for February 28. 
A biographic sketch, with portrait, of the late Thomas A. Williams 
appears in Zhe Asa Gray Bulletin for January, a journal of which 
Professor Williams was editor-in-chief at the time of his death. 
Portraits of Thomas Meehan and Frederick Law Olmsted are 
published in Zhe American Florist of March 23. 
PALEOBOTANY. 
The Jurassic Flora of Great Britain.' — The present contribution 
from the pen of Mr. Seward, which will find a warm welcome from 
paleobotanists generally, deals with the fossil plants from the Infe- 
rior Oólite of the Yorkshire coast and is presented in the form of an 
illustrated catalogue, which is evidently designed to serve as the 
basis of further systematic treatment of the species, as well as of à 
more ample discussion of stratigraphical relations.. In the present 
volume, therefore, the author attempts little beyond an endeavor "s 
record the location of the various types found; to discuss the dif- 
ferent species historically ; to illustrate each type by excellent draw- 
ings; to institute a preliminary comparison with the Jurassic floras 
of other countries, and to simplify the nomenclature. Generic and 
specific diagnoses are presented only in special cases. 2 
The material utilized is primarily that contained in the British 
Museum and represented by six different collections, of which the 
specimens derived from the collection of the late William Bean of 
Scarborough, by purchase in 1859, constitute the most important 
elements. Another section of the Bean collection is deposited 1M 
; of 
Seward, A. C. A Catalogue of the Mesozoic Plants in the Department 
Geology, British Museum, Part III. The Jurassic Flora. London, 1900- Larg 
8vo. 341 pp. 21 plates. ; 
