582 SUMMARY OF CURRENT RESEARCHES RELATING TO 



De Gasparis, A. — Le Alghe delle argille marnose pleistoceniche di Taranto. 



(The algae of the Pleistocene marly clay of Taranto.) 



Att. Accad. Sci. Napoli, xii. (1905) 8 pp. (1 pi.). 

 Gctwinski, R. & Z. Chimelewski. — Contribution a l'etude des Algues du 

 Kameroun. (Contribution to a study of the algae of Cameroon.) 



Ann. biol. lacustre, i. (1906) pp. 168-79. 



Kjellman, F. R. — 0m frammande alger ilanddrifna vid Sveriges vastkust. (On 

 foreign algae washed ashore on the west coast of Sweden.) 



Arkiv f. Botanik, v. (1906) No. 15, pp. 1-10. 



Kofoid, C. A. — Dinoflagellata of the San Diego Region. 1. On Heterodinium, 

 a new genus of the Peridinidae. 



[The author proposes the name of Heterodinium for a new genus which is 

 to include 13 species, of which five are new. It is divided into three sub- 

 genera.] Univ. California Publications, Zoology, ii. (1906) 



pp. 341-68 (3 pis.). 



M a z z a, A. — Saggio di Algologia oceanica. (Essay on oceanic algology.) 



[A continuation, which includes Acrotylus, Endocladia, CJwndrus, Iridma, 

 and Gigartina.~\ Nuov. Not., xvii. (1906) pp. 81-101. 



Migula, W.— Thome's Flora von Deutschland. Kryptogamen. (Flora of Germany. 

 Cryptogams.) 



[Continuation, finishing Diatomaceae and beginning Desmideae.] 



Gera: Zezschwitz, 1906, vi. lief. 30, pp. 353-84 (5 pis.). 



Ross, H. — Contribuzioni alia conoscenza della flora Sicula. (Contributions to a 

 knowledge of the Sicilian flora.) 



[The author records seven species of Characese with varieties, adding 

 critical notes thereon. The plants were collected in 1884-5 and 1887-97, 

 and determined by L. Holtz.) Bull. Soc. Bot. Ital. (1905) pp. 254-8. 



Fungi. 



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



Nuclear Fertilisation in the Mucorini.* — Dangeard holds that the 

 cells which fuse to form the zygospore in the Mucorini are not to be 

 regarded as gametes, but as gametangia. The protoplasm of the zygo- 

 spore passes through a series of changes : from a dense condition it 

 becomes vacuolar, then reticulate, and again vacuolar. At the close of 

 the reticular period, the nuclei are seen to fuse in pairs ; the mature 

 zygospore contains a large number of the fused nuclei, which provide, on 

 germination, the nuclei of the new hyphge. Dangeard maintains that 

 the nuclei which fuse come from the different gametangia. The fusions 

 take place progressively as the different nuclei come into contact. 



Contribution to the Study of the fleshy Discomycetes. t — J. 

 Lagarde divides his paper into two parts ; the first treats of the history, 

 terminology, and technique of these fungi. The second and longer part 

 includes the results of his own observation and research, and falls into 

 three divisions — the general anatomy, the descriptions of different species 

 and individuals ; and finally, the conclusions he has drawn from the 

 consideration of the group. 



Lagarde follows Boudier in regarding the dehiscence of the ascus as 

 an important factor in classification, and he recognises two great groups : 

 those in which the ascus opens by a lid or cap, and those in which the 



• Comptes Rendus, cxlii. (1906) pp. 645-6. See also Bot. Centralbl., ci. (1906) 

 p. 647. t Ann. Sci. Nat., ix. (1906) pp. 125-256 (2 pis. and 58 figs.). 



