ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 747 



the bulb and on the lamina, and that therefore the only reason for sepa- 

 rating the species from Laminaria is done away with. It differs from 

 Laminaria only in the possession of a bulbous base, while from the 

 other species of Saccorhiza, S. dermatodea, it differs in the important cha- 

 racter of possessing cryptostomata, which are absent in 8. dermatodea. 

 S. bulbosa should, therefore, be replaced in Laminaria, possibly in a sub- 

 genus. 



Ceramium pallens.* — Gt. B. De Toni has made an examination of 

 the type specimen of Ceramium pattens Zanardini, and decides that it is 

 no more than a form of the variable C. barbatum Kiitz. The sporangia 

 are divided cruciately and not triangularly ; and in immature sporangia 

 there is simply a bipartition resembling the spores of Crouania bi- 

 spora. The presence of cruciately divided sporangia in a plant which 

 otherwise exactly resembles Ceramium barbatum, is not sufficient, in the 

 author's opinion, to justify its position as a distinct species ; and the 

 more so, since there is so great a variability in this respect in other 

 genera, and sometimes even in the same species, of the Ceramiaceas. 

 He discusses this question, and gives examples to prove his point. 



Lucas, A. H. S. — Revised List of the Fueoideae and Florideae of Australia. 



[The author devotes his Presidential Address to this subject, and enumerates 

 1050 species of marine algae from Australia.] 



Proc. Linn. Soc. New South Wales, xxxiv. (1909) pp. 8-60. 



Mazza, A. — Saggio di Algologia oceanica. (Notes on marine algae.) 



[A continuation, in which are treated Chondria, Cladhymenia, Lophurella. 

 and part of Polysiphonia.] Nuov. Notar., xx. (1909) pp. 65-86. 



Rasmcssen, R. — Bemaerkninger om Vaeksten af Bladet hos Alaria esculenta 

 paa Faerberne. (Remarks on the growth of the frond iu Alaria esculenta at the 

 Faeroes.) 



[Describes and figures the periodical renewal of the lamina.] 



Bot. Tidsskrift,, xxix. (1909) pp. 333-5 (figs.) 



Schodduyn, R. — Un coup d'oeil sur la Flore algologique des eaux-douces et 

 saumatres de Bergues (Nord). (A glance at the algological flora of fresh and 

 brackish water at Bergues). 

 [A list of 153 species.] 



Bull. Acad. Internat. Giogr. Bot., xvii. (1909) pp. 163-72. 



Fungi. 



(By A. Lorrain Smith, F.L.S.) 



Contribution to the Cytology of Synchytrium and its Hosts.! 

 S. Kusano has followed the development of Synchytrium Puerarise and 

 S. decipiens, both of which are practically the same. Swarm-spores of 

 the fungus are liberated on the surface of the leaf, and enter by the 

 stomata or water-pores ; in the tissue the spore grows out to a spherical 

 orange-yellow body. Successive mitotic nuclear divisions take place ; 

 . five chromosomes are formed ; an intranuclear spindle appears, and the 

 nuclear membrane disappears ; after migration of the chromosomes the 

 spindle breaks at the centre, and a half is withdrawn to each pole ; 



* Nuov. Notar., xx. (1909) pp. 87-93. 



t Bull. Coll. Agric. Tokyo Imp. Univ., viii. 2 (1909) pp. 79-147 (i pis.). See 

 also Bot. Centralbl., cxi. (1909) pp. 226-7. 



