560 , SCIENTIFIC RECORD FOR 1882. 



A number of descriptive papers on diatoms have appeared. Cleve 

 and Moller described a large number of species from Northern Siberia, 

 collected by the Yega Expedition ; Reinhard described the diatoms of 

 the White Sea; Cleve and Jentzsch, species from North Germany, 

 and Juhlin-Dannfelt, species from the Baltic. Of Schmidt's Atlas der 

 BiatomeenTiunde parts 19 and 20 have appeared, and of Van Heurck's 

 Diatomees de Belgique, part 5, including the Crypto- Raphidece. The Am. 

 Micros. Journ. contains two articles on the motion of diatoms by H. 

 Mills and C. M. Vorce. 



Lichens. — The most important work on lichens which has api)eared 

 during the year is Tuckerman's Synopsis of North American Lichens, 

 part 1, which gives descriptions of all our species of ParmeUacei, Clo- 

 doniei, and Ccenogoniei, including 411 species and 40 genera. Minks 

 has issued a second part of his Symbolw Licheno-Mycologicw. G. Krabbe, 

 in the Bot. Zeitung, has an article on the apothecia of certain lichens, 

 belonging principally to the genera Bceomyces and Cladonia, and finds 

 that the formation of the apothecia is entirely a vegetative process, as 

 he was unable in the genera studied to find ascogonia and trichogynes, 

 as had been observed in Collema by Stahl. Additions to the lichen 

 flora of Europe have been published by Nylander in Flora, which jour- 

 nal also contains the continuation of Arnold's Lichenologische Frag- 

 mente; Jatta has described Lichens from Southern Ltaly in the Giorn. 

 Bot.', Miiller, Socotra lichens, collected by Bayley Balfour, in Proc. Boy. 

 Edin. Soc. ; and Crombie, species collected in the East Indies by Main- 

 gay, in the Proc. Linn. Soc. The Lichenes Gallici of Eoumegu^re have 

 been continued in a fourth part, and Olivier's Herhier des Lichenes de 

 VOrne et du Calvados has been continued through parts 5 and 6. In the 

 Journ. Linncean Soc, Charles Knight has described a considerable num- 

 ber of new species from New South Wales. 



ARCHEGONIATA. 



Characece. — The manuscript of the late Alexander Braun has been 

 edited by Norstedt, and has been published in the Abhandl. AJcad., 

 Berlin, under the title Fragmente einer Monographie der Characeen. The 

 number of species and subspecies described is 142, including many forms 

 which had not been previously described. In this country Dr. T. F. 

 Allen has published two papers : " Observations on some American 

 Forms of Ghara coronata" in Am. Naturalist', and "Development of 

 the Cortex in Ghara^^ in the Torrey Bulletin. 



Hepaticw. — But little has appeared on this group of plants. Lind- 

 berg's Monographia jjrwcursoria Peltolepidis, Sauterice, et Clevcw, besides 

 treating of the three genera just named, has notes on some other Mar- 

 chantiacece. Massalongo and Carestia describe some Hepaticae from the 

 Apennines, in the Giorn Bot. A general synopsis of the Hepaticae of 



