412 Bryophyten. — Pteriodophyten. 



respect, than those of the Northern hemisphere, and the present 

 paper will form a good working basis for future work. 



J. H. Maiden. 



Williams, R. S., Austinella, gen. nov. (Bryologist. XIV. p. 70, 71. 



text figures 1— 4. July, 1911.) 



Description of Austinella R. S. Williams, with a Single species: 

 Austinella Rauei (Aust.) Williams, described originally as Syrrhopo- 

 don? Rauei Aust. This plant, which is known only from the type 

 Station in Pennsylvania and from a Single locality in Georgia, 

 is said to have much the appearance of Trichostomum hibernicum 

 (Mitt.) Dixon , which, however, is distinguished by its narrower leaf 

 base, by having the leaf-point stouter and entire, and by having 

 the cells papillose and rounder above. It is compared also with 

 Dicvanum fulvum. Maxon. 



Wilson, M., Spermatogen esis in the Bryophyta. (Ann. Bot. 

 XXV. p. 415-457. Pls. 37—38. 3 Textfigs. 1911.) 



This paper opens with a summary of previous work dealing 

 with spermatogenesis in the Bryophyta. The author then records 

 the results of his investigations on Mnium hornum, Atrichum un- 

 dulatum, and Pellia epiphylla which may be summarised asfollows: 



In Mnium hornum and Atrichum undulatum the divisions of 

 the spermatogenic cells are normal, and no centrosomes are present. 

 No reduction in the number of chromosomes takes place at the 

 final mitosis. In Pellia epiphylla centrospheres and probably centro- 

 somes are present during the later divisions in the antheridium. 

 The blepharoplast is probably derived directly from the centrosome. 

 In the spermatid of Mnium hornum a number of bodies become 

 separated from the nucleolus. They pass into the cytoplasm and 

 coalesce to form a hollow spherical body, for which the name "limo- 

 sphere" is suggested. The nucleolus then divides into two masses, 

 which both pass into the cytoplasm; one of these lunctions as the 

 blepharoplast, while the other gives rise to the accessory body. In 

 the spermatid of Atrichum undulatum, three bodies are separated 

 from the nucleolus and pass into the cytoplasm. The body first pro- 

 duced functions as the blepharoplast, and the other two form the 

 "limosphere" and accessory body. In Pellia epiphylla a limosphere 

 and accessory body are present in the cytoplasm of the spermatid. 

 Their origin "was not determined. Agnes Arber (Cambridge). 



Holloway, J. E„ A Comparative Study of the Anatom y 



of Six New Zealand species of Lycopodium. (Transactions 



and Proceedings of the New Zealand Institute, New Issue, Vol 



XLII, p. 356-370, with 7 Text figures and pl. XXXI-XXXIV; 



1909 published 1910.) 



The species investigated are Lycopodium volubile Forst, L. cer- 



nuum Linn., L. densum Lobel, L. laterale R. Br., and L. Billardieri 



Spring. L. laterale possesses a protocorm which, in its early stages 



recalls that of L cernuum ; the differentiation of the apex of the 



stem is, however, postponed for some time and the protocorm elon- 



gates sideways "as a rhizomatous structure", attaining in some cases 



to a length of l cm. and a thickness of 2 -3 mm. It may branch 



and bears numerous dorsal protophylls; the stem apex is eventually 



differentiated by the aggregation of some of these at a point on the 



