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REVIEWS 



THE STUDENT'S HAND-BOOK OF BRITISH HEPATICS 



By S. M. Mac vicar 



This is a companion book to Dixon's Handbook of Mosses and is published 

 by the same house, (see adv.) It gives every indication of being as useful to- 

 American students of hepatics as Dixon's work has to American students of 

 Mosses. 



It is "Demy 8vo.," of 463 pages of clear print on excellent paper. The 

 numerous illustrations by Jameson are clear and pleasing and are inserted in 

 the text instead of being placed in plates at the end. This arrangement is a very 

 great saver of time to the student and adds to the attractiveness of the pages. 



The Introduction discusses the general characters and structure of the 

 Hepaticeae, "Vegetative Reproduction," "Collection and Examination" and 

 "Classification and Nomenclature." 



The keys are based on easily ascertainable characters so far as possible. 

 The descriptions are clear and concise, yet ample and expressed, in simple lan- 

 guage. There is a sufficient synonomy and an abundance of critical notes. 



It is a book necessary to every student of hepatics, whether a beginner or a 

 college professor. Its only serious failing for American students is that it treats 

 of British plants instead of American. May we soon have an American book oa 

 the same plan! For the convenience of American students, I have arranged 

 to keep the book in stock for a few months so as to make immediate delivery. 



A. J. Grout 



THE JUVENILE FORMS OF MOSSES AND THEIR CULTURE 



(Die jugend Formen der Laubmoose und ihre Kultur). By P. Janzen. 



In German. Reprinted from the 35. Bericht des Westpreussischen Bota- 

 nisch — Zoologischen Vereins, at Danzig, Press of A. W. Kafeman G. m. b. H.^ 

 1912. 



This reprint is probably repaged, comprising pages I to 62. There are 

 21 figures printed in the text. 



In the introduction of 9 pages, the author gives the instructive history of 

 the efforts at germinating moss spores in the attempt to follow out their life 

 history. The merits of Hedwig, Bridel, Naegeli, Schimper, Guembel, and of 

 others, in this investigation are touched upon, and the story of our present view- 

 point on the nature of the protonema and its place in the life history of Mosses is 

 well told. The author then gives the details of his method of moss spore germi- 

 nation, advocating as the best substratum agar-agar, with the usual nutrient 

 solutions, in small Petri dishes. Students desiring to continue these investiga- 

 tions, as well as teachers who may wish to repeat these efforts in their instruc- 

 tions, will find helpful hints in this paper. 



