ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 467 



Propagules of Hepatics.* — C. Douin gives an account of the pro- 

 pagules of the Cephaloziellaceas and some other hepatics. 1. He restricts 

 the meaning of propagules to those bodies on the gametophyte which 

 having reached a more or less constant form can fall off, survive un- 

 favourable periods, and eventually give rise to the different states of 

 development seen in the germination of spores. In successive chapters 

 he describes : — 2. Different sorts of propagules. 3. Their development. 

 4. Their place of origin. 5. Causes that influence their production. 

 6. The role they play. 7. The amphigastria of propagules. 8. Im- 

 portance of propagules in systematic botany. He adds a key and seventy- 

 four figures. 



Riella.f — R. Douin discusses the genus Riella, and describes and 

 figures the structure of the gametophyte and sporophyte, the vegeta- 

 tive multiplication. He compares it point by point in parallel columns 

 with Sphserocarpus, concluding that the two genera ought to form a 

 special group divided into two tribes, Sphasrocarpoidese and Rielloideas. 

 He carefully considers GoebeFs arguments that the group should be 

 placed in the Marchantiales, and the arguments of others in favour of 

 Jungermanniales and Sphan'ocarpales. The genus forms an isolated 

 group, entirely different from all other hepatics in its winged stem, and 

 allied to Sphserocarpus in its fructification. 



Lophozia Hatcheri. J — G. Dismier has made a study of the hepatics 

 grouped round Lophozia barbata, with special reference to L. Hatcheri, 

 a South Patagonian species, first described as Junyermannia Hatcheri by 

 A. W. Evans in 1898, and since shown to be identical with the European 

 Lophozia Baueriana Schiffn. Dismier, in examining the specimens of 

 L. Floerkei and L. lycopodioides in the Paris Museum, found that most 

 of the examples under L. Floerkei belong really to L. Hatcheri, but that 

 none under L. lycopodioides can be so transferred. He gives a resume 

 of the points of structure which characterize L. Hatcheri, and states that 

 it is well distinguished from L. Floerkei, but he regards it as a sub- 

 species of L. lycopodioides. 



Hypopterygium.§ — J. M. Holzinger discusses Hypopteryyium japoni- 

 cum Mitt., and gives figures of its structure. From a comparison of 

 specimens he is able to show that H. canadense Kindb. is a synonym, 

 and that plants from Japan, Alaska, and British Columbia, are all one 

 and the same species, the wide distribution being probably due to the 

 Kuro Siwo, or Japan Stream, which traverses the Pacific Ocean as the 

 Gulf Stream does the Atlantic. He objects to the use of the word 

 "amphigastria" for the small medial leaves, and suggests "ventral 

 bracts " or ventral leaves as preferable. 



* Bull. Soc. Bot. France, lx. (1913) pp. 477-95 (1 pi.). 



t Rev. Gen. Bot., xxv. bis (1914) pp. 195-202 (1 pi.). 



t Bull. Soc. Bot. France, lx. (1914) Session extraord. 1913, pp. lvii-lx. 



§ Bryologist, xvii. (1914) pp. 44-5 (1 pi.). 



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