254 Fungi) Bacteria und Pathologie. 



HOLWAY, E. W. H., North American Uredmeae. (I. p. 33 — 56. 



1906.) 

 The second fascicle of this work shows the same high Standard 

 of excellence of workmanship and of inateriai that was exhibited in 

 part one. Attention is especially calied to the plates which are 

 photomicrographs of spores. Many are made from type specimens 

 and are of special value for this reason. 



Each species is represented by one or more photographs. The 

 species given are arranged by their hosts as follows : Fuccinia se- 

 pulta B. and C. on Flcus (f), P. Comandrae Peck. on Comandra 

 palllda and C nmheüata^ P. asarüia Kye. on Asarum caii- 

 clatum, A. Lemmoni and A. majiis, P. oniata Arth. and Holw. on 

 Riimex Brittanica, P. piinctiformis Diet. and Holw. on Riimex salici- 

 folius and R. hymenosepalus, P. Acetosa (Schum.) Koern. on Rumex 

 liastaialus, P. Oxyriae Fckl. on Oxyria digyna, P. Bistortae (Str.) 

 DC. on Polygonum bistortoides and P. llnearifoVmm, P. amplilspilusa 

 Diet. and Holw. on Polygonum sp., P. Polygoni-amphibii Pers. on 

 Polygonum Convolvuli, P. scandens, P. hlrsuium, P. emersum, P. 

 Pennsylvanicum, P. lapathifolium, P. hydropiperoides, P. Hart- 

 wrightia, and P. Virginiana, P. septentrionalis Juel on Polygonum. scan- 

 dens, P. Guillemineae Diet. and Holw. on Guilleminea illecehroides, 

 P. macropoda Speg. on Iresine sp., P. claytonlata (Schw.) Syd. on 

 Claytonia Caroliniana, C. Virginiana, C. megarrhiza, Montia 

 asarifolia, and M. sibirica, P. Arenaria (Schum.) Wint. on Stellaria 

 longipes and varieties, 5. borealis, Dianthus barhatus, Spergula 

 arvensis and Cerastium arvense, P. hysteriiformis Peck on Arenaria 

 Utahensis, P. niodica Holway on Arenaria spp., P. Holboellii 

 (Hörnern.) Rostr. on Arabis spp., Erysimum spp. etc., P. Drabae 

 Rudolphi on Drriba arabisans, P. aberrans Peck on Smelowskia 

 Americana, P. Thlaspeos Schubert on Thlaspi glaucum, P. Uta- 

 hensis Garrett. n. sp. on Thlaspi glaucum, P. curtipes Howe on 

 Saxifraga spp., Heuchera spp. and Mitella spp., P. Chrysoplenii 

 Grev. on Saxifraga punctata, P. Laurentia Treb. on Saxifraga 

 nudicaulis, P. aspera Diet. and Holw. on Saxifraga mertensiana, 

 P. turrita Arth. on Saxifraga bronchialis, P. pallido-maculata E. 

 and E. on Saxifraga Lyallii and 5". punctata, P. Heucherae (Schw.) 

 Diet. on Mitella spp., fieuchera spp., Elmera raceniosa, Saxifraga 

 spp., Tiarella spp., Tellima grandiflora, and Tolmiae Menzesii, P. 

 Lithophragmae Holway n. sp. on Lithophragma parviflora, P. tri- 

 foliata E. and E. on Tiarella trifoliata, P. Parnassia Arthur on 

 Parnassia fimbriata, P. Parkerae Diet. and Hohv. on Ribes lacustre. 

 P. Ribes on Ribes rubrum, P. Rhodiolae B. and Br. on Sedum ro- 

 seum, P. Sieversiae Arthur on Sieversia turbinata, P. Waldsteiniae 

 Curt. on VValdsteinia fragarioides, and P. Pruni-spinosae Persoon 

 on Prunus spp. Perley Spaulding. 



QUEHL, Alfred, Untersuchungen über die Myxobakterien. 



(Centralbl. f. Bakteriolog. etc. Bd. XVI. Abt. II. 1906. p. 9—34. 



Mit 1 farbigen Tafel und 3 Figuren.) 



Verf. beschreibt, nachdem er die Literatur über diesen Gegen- 

 stand besprochen, eine Anzahl Myxobakterien der Gattungen Chon- 

 dromyces, Polyanginm und Myxococcus, welche er aus der Umgebung 

 von Berlin " und auch aus einigen tropischen Orten 

 stammenden Mist gefunden hat, dabei gleichzeitig eine Zusammen- 

 fassung der bisher bekannten Arten gebend. Von den Myxococcen 



