ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 327 



forms alternately dorsal and ventral segments ; the further development 

 of these is followed out in the paper, as is also the formation of new cells 

 at the apical margin. 



European Hepaticse.* — K. Miiller issues the first part of the second 

 volume of his monograph of the European hepaticae in Rabenhorst's 

 Krvptogamen-Flora. He gives an introduction to the family Trigon- 

 anthea?, and a key to its three sub-genera and eleven genera. He then 

 treats of the genus Cephalozia and its sixteen species, giving a key to 

 the species, a pedigree-plan, and a synoptical table showing the im- 

 portant distinctive characters of the European species — in respect of 

 the leaves (shape, size, etc.) and size of leaf-cells, involucre, perianth, 

 inflorescence. There are text-figures to show the structure and mor- 

 phology of each species. 



Boulaya.t— J. Cardot gives a careful description of Boidaya Mitteniiy 

 the type of a new genus and new tribe of mosses, belonging to the 

 family Leskeaceae. It is a Japanese moss, and was originally described 

 as Meteorium humile in 1891 by Mitten, who erroneously believed it to 

 be identical with Trachypus humiUs Lindb. Brotherus discovered the 

 mistake, and named the plant Thuidium Mittenii in 1899, and in 1908 

 transferred it to Forsstroemia. Cardot finds the peristome characters to 

 be so distinct that he considers them indicative of a well-marked new 

 genus. 



Clastobryum in America. J — B.. S. "Williams publishes a note on the 

 occurrence of the Malayan genus Clastohryum in Central and South 

 America, and describes the structural characters of the American 

 specimens. 



Holomitrium vaginatum.§ — I. Theriot has been studying the genus 

 Holoniitrium, and finds that H. tahitense, H. hrevifoUum, and H. densirete 

 are but synonyms of H. vaginatum Hook. Also that to H. affine must 

 be referred H. vaginatum Schw., Dicranum calycimim Brid., and Weisia 

 vaginans Brid. He gives figures of the microscopic structure of these 

 plants. 



Leucodontopsis.|| — E. G. Britton publishes a note on Leucodontojjsis 

 Jloridana, in which she shows that L. pJicata Ren. and Card. (1893) from 

 Costa Rica, is identical with Neckera {Pilotrichum ?) Horidana Aust. 

 (1879) from Caloosa in Florida. She figures the leaf-structure, and 

 shows that the distribution of the species includes Cuba, Porto Rico, 

 and the Bahamas. The plant is unknown in the fertile state, but appears 

 to belong to the Leucodontaceje. 



*& 



New Varieties of Mosses. T — C. Meylan describes some new varieties 

 from the Jni'a—FohUa nutans var. camptocarpa, Encalypta commutata 

 var. striata, Serpolaskea Sprucei var. serrata, Trichostomum crisjndum 

 var. accuminata. 



* Leipzig : Kummer (1912) lief. 15. pp. 1-80 (figs. 1-23). 

 + Rev. Brvolog., xxxix. (1912) pp. 1-3. 

 X BrTologist, XV. (1912) p. 31. 

 § Bull. Soc. Bot. Geneve (1911) pp. 245-52 (figs.). 

 !l Bryologist, xv. (1912) pp. 26-8 (figs.), 

 t Rev. Brvolog., xxxix. (1912) pp. 18-19. 



