76 SUMMARY OF CURRENT RESEARCHES RELATING TO 



Ludovico Nee in amicitife pigniis. Sacrum vult. Philippus Durand." 

 It was prepared by P. Durand and dedicated to L. Nee ; and it contains 

 17 zoophytes and 8 algae. De Toni copies each of the labels, and adds 

 to it a note as to the modern name of the specimen. 



Necrology of Algologists.* — G. B. De Toni writes obituary notices 

 of the three following algologists : — Bengt Jonsson, professor at Lund 

 in Sweden (d. March 8, 1911) ; E. Zacharias, director of the botanic 

 garden at Hamburg (d. March 23, 1911) ; Fr. Hevdrich, of Wiesbaden 

 (d. March 7, 1911).^ 



BoRGEST, A. — Kern- und Zallteilung bei marinen Ceratiumarten. (Nuclear 

 division and cell-division in marine species of Ceratium.) 



Arch. f. Protistenk., xx. (1910) pp. 1-46 (3 pis.). 

 JoLLOS, V. — Dinoflagellatenstudien. (Studies of the Dinofiagellatfe. 



Arch. f. Protistenk., xix. (1910) pp. 178-206 (4 pis.). 



Fungi. 



(By A. LoBEAiN Smith, F.L.S. 



Notes on Mucor.| — Fernand Moreau finds, in the zygospore of three 

 species of Mucorini, nuclear fusions and nuclear degeneration. He 

 describes more particularly the gametangia in a species of Mucor. At 

 the time of fusion they contained a loose network of protoplasm with 

 large vacuoles and numerous nuclei. Shortly after fusion the nuclei 

 showed karyokinesis, the spore-membrane thickened, and a thorny epi- 

 spore was formed. At this stage many spore fusions were observed- 

 The nuclei that did not fuse gradually degenerated. Similar conditions 

 were observed in Sjwrodiiiia. In ZygorhyncJms the same phenomena 

 were noted, but many more nuclei degenerated ; two fused nuclei alone 

 were left. 



Methods of Reproduction in Saprolegniaceae.J — A. E. Lechmere 

 has made elaborate cultural studies of two species of Sajyrohgnia. He 

 finds that the first, S. torulosa, shows great variety in the form and 

 occurrence of the oocysts and antherocysts. The second species, 6'. 

 Thnreii, is characterized by peculiar variations in the method of for- 

 mation of the sporocysts, which arise by basipetal segmentation of the 

 hyphse. Gemmae were noted for the first time in this species. , 



AUomyces : a New Aquatic Fungus.§ — E. J. Butler found the 

 new fungus on dead flies both in standing and in river water. It 

 appears to the naked eye like a Saprolegnia colony. It was isolated and 

 cultivated on dead sterile flies and ants. Butler considers it to be one 

 of the Leptomitaceae, but an aberrant member of the family, as it has a 

 completely segmented thallus. Its nearest ally is probably Blastadadia, 

 and along with that genus and Gonapodya it constitutes a group of 

 forms with non-cellulose walls and predominantly one-ciliate zoospores. 

 The author finds that the group shows affinity to Alonohlepharis, and 

 has probably been derived through Monoblepharis from the Siphonese. 



• Nuov. Notar., xxii. (1911) p. 206. 



t Bull. Soc. Mycol. France, xxvii. (1911) pp. 334-41 (4 figs.). 

 X New Phytologist, x. (1911) pp. 167-203 (6 pages of figs.). 

 § Ann. Bot., xxv. (1911) pp. 1023-34 (1 pi.). 



