133 
In this volume Prof. Brun figures and describes eighty-eight 
new species and twenty-five new varieties of diatoms. He also 
constitutes three new genera, viz: Cotyledon, Radiopalma and 
Hydrosilicon. These are all difficult forms to place and doubtless 
will give rise to some discussion. The plates are of unusual ex- 
cellence, being phototypes from photo-micrographs, made by Dr. 
H. Van Heurck and M. Otto Muller by the aid of the new apo- 
chromatic lenses of Zeiss. C7 Eh, ae, 
Index to Recent Literature Relating to American Botany. 
Atriplex corrugata. S. Watson. (Bot. Gaz. xvi. 345). 
A new species from Colorado. 
A New Herbarium Pest. C. V. Riley. (Bot. Gaz. xvi. 334, il- 
lustrated). ; 
Botanical Excursion to “ The Chats"—A. (Ottawa Nat. v. 
197). 
Botanical Section—Report of. James Fletcher and others. (Ot- 
tawa Nat. v. 200). 
Botanical Section of the Phila. Acad. Sci.—Report of. J. H. 
Redfield. (Proc. Acad. Nat. Sci. Phila. 500, 1891). 
Botanical Section—Report of. Proc. Rochest. Acad. Sci. i. 120). — 
Lithospermum hirtum and Veronica Buxbaumii are among 
other interesting plants reported from the vicinity of Rochester. 
Attention is called to the curious differentiation in the size and 
division of the leaves of Taraxacum officinale, variations not 
noted in the botanies. 
Cesalpinia pauctjuga. (Hook. Icones Plant. x. pl. 1977). 
Canna flaccida, (Meehan’s Month. ii. 36). 
Catostemma Sragrans. (Hook. Icon. Plant. x. pl. 1986). 
Clematis paniculata. (Gard. & For. v. 90). 
Cynoches glanduliferum. R. A. Rolfe. (Gard. Chron. xi. 204). 
Das Nicht vorkommen der Wursel von Polygala alba mit der 
Senega des Handels, J W.Lloyd. (Pharm. Rundsch. x. 51). 
Desmid—A Proposed New. Wm. N. Hastings. (Am. Micros. 
Journ. xiii, 20). 
Description and figure of Gonatozygon aculeatum. 
Elms of the St. Lawrence Valley—The. T. H. Hoskins. (Gard. 
& For. vy. 86). 
