94 • 



pothetical views and more or less disputable reasonings. No one 

 paid any attention to the ideas put forth by Duchesne, and to such a 

 point that a conscientious biographer, who pronounced his eulogy 

 in a public assemblage, omitted them entirely." 



Botanical Literature. 



Wah 



Diato- 



maceae. With colored Plates. By M. C. Cooke, LL.D. Lon- 

 don : Williams & Norgate. 1882. 

 Since the pubHcation, in 1852, of Hassall's History of the Brit- 

 ish Fresh-Water Algae, a work now classed among rare books, and one 

 seldom obtainable, we believe that no other on this subject has ap- 

 peared in the English language, if we except Dr. Wood's incomplete 



monograph, which was published by the Smithsonian Institution in 

 1872. 



All students of these plants, then, both English and American, 

 will welcome the Manual which Dr. Cooke is compiling and pub- 

 hshmg under the above title. The first part of the work, which has 

 just reached us, is devoted to the Palmellaccae, and consists of 

 twenty-eight octavo pages of descriptions in English, with copious 

 notes and observations, accompanied with eleven excellently colored 

 plates. The second part, which is now in course of preparation, 

 will include the Protococcaceae and Volvocineae, and this will soon be 

 followed by a third part devoted to the Zygnemaceae. The author 

 estimates that it will require about twelve parts to complete the 

 work, and these will be furnished at prices varying with the size. 

 Judging from the comparatively low price of the part before us, the 

 cost of the entire work will prove quite moderate, even at the adver- 

 tised price ; yet Dr. Cooke offers the inducement of a discount of 25 

 per cent, from the latter to those who subscribe now, each part to be 

 paid for as published. 



Flora of Westchester County (N. Y.). Ey Oliver R. Willis, A.M., 

 Ph. D., 8vo., pamph., pp. 56. New York : Roper &: Burdge. 

 Durmg the half century that has elapsed since the publication 

 by the late Dr. S. B. Mead, in the Reports of the Regents of the 

 University for i83i-'32, of a list of plants found growing in the 

 vicmity of North Salem Academy, nothing has been added to our 

 knowledge of the flora of Westchester Countv, excepting an occa- 

 sional note in the Bulletin ; and no one had examined the entire 

 region with a view to making a complete report until Dr. Willis was 

 induced to do so by the Rev. Robert Bolton, the author of the His- 



Westchest 



It was for this work that the Cata- 



logue was especially prepared, and from this that the reprint before 



US was tntpn ^ 



According to the author, there have been detected in the County, 



alUer Of^^r ). """' '''4' phaenogams and 46 ferns and theS 

 allies. Of the phaenogams, 50 are trees reaching a height of ^o 

 feet and beyond ; 34 are trees attaining a height ic to .0 feet and 

 69 are shrubs, all of which are growing%vithout cukilation and very 

 few of which have been introduced. Of the entire numbe of plants 



