1028 The American Naturalist. [December, ` 
from leading authorities on the subject of the work, (the Crinoidea), 
that it was not published at the time the review was issued, nor it is yet 
published. We make this statement, since it is-important that the date 
of publication of all books, especially scientific books, should be correctly 
ascertained and reported, and because we desire to prevent any confu- 
sion as to the date of this particular publication which might arise from 
our having published the review in question. As is usual with period- 
icals, we assume no responsibility for articles published in the NATU- 
RALIST unless they are anonymous. 
The dates of publication of the numbers of the AMERICAN NATU- 
RALIST during the years 1895, and 1896 are as follows: for 1895; Jan., 
Jan. 15th; Feb., Feb. 14th ; March, Mch. 6th; April, Apl. 9th; May, 
May, 13th; June, June 3d; July, July 9th; August, July 31st; Sept., 
Aug. 28th; Oct., Sept. 26th; Nov., Oct. 29th; Dec., Dec. 6th. 
For 1896; Jan., Dec. 31st, 1895; Feb., Jan. 30th; March, Mch. 9th; 
April, Apl. 2d; May, May 2d; June, June 3d; July, July 2d; August, 
Aug. 6th; Sept., Sept. 9th; October, Oct. 3d; Nov., Nov. 2d; Dec., 
Dee. 5. 
RECENT LITERATURE. 
Gregory’s Plant Anatomy.'—Among the host of botanical text- 
books that are constantly appearing, it is a pleasure to welcome one 
that is a contribution to certain departments of botanical literature, 
rather than a mere exposition of the laboratory and lecture methods, 
good, bad, and chiefly indifferent, of the author. While it is to be 
assumed that American investigations in histology and in cytology have 
not been lacking during these past few years, the fact remains that they 
have not as yet resulted in an increase of literature upon these subjects. 
While there can be no doubt that the tide is setting steadily and 
strongly in the direction of higher things in cisatlantic botany, this 1s 
as yet a premonition rather than a fact, and the few texts leading to- 
ward this are to be regarded as pioneers and valued as such. These 
books are divisible into two classes, and in evaluating them, it is neces- 
sary to measure them by a proper standard. Thus, a book which purports 
to be a textbook should not be criticized because it does not manifest 
í Elements of Plant Anatomy, by Emily L. Gregory, Ph. D. Professor of 
Botany in Barnard College. Ginn & Co., Boston, 1895, pp- VIII, 148. 8vo. 
