ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 465 



tables the number of endemic species of each genus in the several 

 twenty regions are shown, as well as the more or less pandemic species ; 

 and the inter-relationsliips of the regions are discussed in the summary. 



Jungprmannia barbata and its Allies.* — H. W. Arnell, when 

 searching among the Barbata? group of" Jungermannia in his own 

 herbarium with a view to discovering, if possible, Swedish specimens of 

 J. Baueriana, a new species established by Schiffner, and recently 

 recorded for Finland and Norway, found that he possessed several 

 examples of the plant from four provinces of Sweden. It occurs in 

 rather dry shady places on silicious rocks. It is a good species, but 

 variable, and absorbs many outstanding forms of J. lycopodioides, 

 J. Floerkei, and /. barbata. The true differences between ./. Baueriana 

 and these latter species are pointed out by the author, who has been 

 forced to the conclusion that J. Baueriana represents the primitive 

 species of the whole group. This assumption he illustrates with a 

 pedigree table, wherein the first descendants of J. Baueriana are 

 ./. lycopodioides, J. FloerJcei, and J. barbata. J. barbata remains 

 without issue ; but from J. lycopodioides proceed in direct descent 

 ./. quinquedentata, J. exsecta, and J. exsectceformis ; while from J. 

 FloerJcei spring two lines, one constituted by J. atlantica, J. gracilis, 

 J.Binsteadii, J. herjedalica and J. polita, and the other by J. quadriloba, 

 J. Kunzeana and J. obtusa. His reasons for this assumption are stated, 

 and critical notes on each of the species are given. 



Hepatics of the Jura.f — Ch. Meylan issues a supplement to his 

 catalogue of the hepatics of the Jura, which was published five years ago. 

 The number of species is now raised from 87 to 115, most of the addi- 

 tions being species which shun the limestone, and which were found on 

 humus, or in bogs, or on silicious soil, the flora of the calcareous soil 

 being restricted or monotonous. The very rare Haplomitrium Hookeri 

 may be more common than is supposed, but is excessively difficult to 

 detect in the sterile state. 



North American Kepatics.^ — E. Claasen publishes a revised key to 

 the species of liverworts recognised in the sixth edition of " Gray's 

 Manual of Botany." It is a continuation, or rather, amplification, of 

 the key published last year in the same journal. The genera are 

 arranged alphabetically, and the characters, by which the species under 

 them are discriminated, are more detailed than is usual in a key with 

 the purpose of rendering determination more easy and more precise. 



Bbotherus, V. F. — Engler und Prantl's Die Naturlichen Pflanzenfamilien. 

 Musci. (Engler and Prantl's Natural Families of Plants. Mosses.) 



[Continuation. Spiridentacete, Lepvrodontacese, Pleurophascacete, Necke- 

 racefe.] Leipzig: Engelmann, 1906, lief 224, pp. 769-816 (33 figs.). 



Gepp, A. — The Dates of Hooker's "British Jungermamiiae " and "Musci Exotici." 

 [Affords means for determining the date of publication of any species or 

 plate in these works.] Joum. of Bot., xliv. (1906) pp. 176-8. 



* Bot. Notiser, 1906, pp. 145-57. 



t Bull. Herb. Boissier, vi. (1906) pp. 489-503 (fig.). 



X Ohio Naturalist, vi. ( 1906) pp. 530-40. 



