286 



THE AMERICAN NATURALIST [Vol. XLI 



doptera found in New England. The second portion (over half) 

 is given to a key to the caterpillars of all but the smaller Lepidoptera 

 of the same region. 



J. F. McClendon has described four new species of ^lyzostoma 

 (Proc. U. S. Nat. Mus., 32, 1907, obtained from the collection of 

 crinoids in the National ^Museum. 



BOTANY 



Sukkulente Euphorbien.^ —This is the first of a series of illustrated 

 handbooks of succulent plants designed by the author to meet the 

 demand that the scattered literature should be brought together in a 

 form accessible to the many cultivators of this group of plants. The 

 aim is to give both a scientific classification and cultural hints on 

 those species now in cultivation and this work has been admirably 

 done, both in the text and in the numerous half-tone illustrations. 



One hundred and nine species and eight varieties of Euphorbias 

 are treated, nine species and two varieties being new to science and 

 three species have been renamed. The species listed are for the most 

 part natives of Africa, though a few are from the adjacent islands and 

 from India, and three are American. A good working key is given 

 to the twelve sections under wliich the ■>|>;-( ies are arranged and the 

 sections again are each provided with good comprehensive keys so 

 that a species may be readily determined. The descriptions are full 

 and clear, supplemented by full synonymy and by additional notes on 

 habitats and comparisons between species, ending in a short note on 

 the culture required for the species. Following the treatment of spe- 

 cies a chapter is devoted to the general culture required for this group 

 of succulents and the text ends in a full index To thv literature bearing 

 on the group. 



In view of the fact that several new species apjiear in the piibliea- 

 tion it may be well to state that, though the title page bears the .late 

 of 1907, copies have been distributed in December I'.MIii. 



1 Berger, Alwin. Sukkulente Euphorbien. Stuttgart, 1907. 12 mo. v -f 

 135 pp. 33 Abb. 



{No. 4S3 was issued March 29, 1907) 



