Bacteriologie. — Pteridophyten. 
665 
montre la perte progressive de ces proprietes qui reapparaissent 
neanmoins avec le retour ä l’anerobiose; la troisieme entraine la 
perte definitive des proprietes. 
L’auteur voit dans cette transformation un argument puissant 
en faveur du transformisme microbien. Un bacille pathogene, ainsi 
depouille de ses proprietes differencielles, ne saurait se distinguer 
d’une espece saprophyte banale. Rosenthal appelle bacillogene ce 
microbe degrade et bien qu’il n’ait pas reussi ä en observer un re¬ 
tour au type primitif, il suppose que les bacillogenes sont la 
source originelle des microbes parasites actifs. 
Les bacteries anaerobies ayant subi avec succes l’aerobisation 
par les methodes indiquees par l’auteur sont: Le bacille d’Achalme, 
identifie avec le Bacillus perjringens Veilion et Zuber, le vibrion 
septique de Pasteur, le Bacillus gracilis ethylicus Achalme et Rosen¬ 
thal, le bacille du tetanos, le bacille du Charbon symptomatique, le 
Bacillus putrificus Bienstock, le Staphylococcus parvulus, Bacillus 
ramosus Veilion. M. Radais. 
Conard, H. S., Homology of tissues in ferns. (Proc. Iowa Acad- 
Sc. XIV. 85-87. 1907.) ‘ 
Author compares apical meristems of root, stem and leaf o r 
Dennstaedtia punctilobula and of other ferns and flowering plants, 
and concludes that since such meristems are not alike, the homology 
of tissues cannot be determined by the manner of their origin from 
apical meristems. Of no greater value is the relation of mature 
tissues to primary meristems. Concludes that “those tissues are homo- 
logous whose form, function and position in the organism point to 
a common origin. And we may safely say that the normal primary 
vascular tissues of all vascular plants are truly homologous”. (Ab- 
stract furnished by author). M. A. Chrysler. 
Hamilton, A., On abnormal developments in New Zealand 
Ferns; with a list of papers by various Authors on the 
Ferns of New Zealand. (Transactions and Proceedings of the 
New Zealand Institute for 1903. Vol. XXXVI. Wellington, Aug. 
1904. p. 334—342. plates 26, 27.) 
The author describes and figures the variations, abnormalities 
and crestings, more or less remarkable, which he has observed in 
Lomavia ßuviatilis , L. proceva, Dicksonia squarrosa , Adianhim Cun- 
ninghamii, Cheilanthes tenuifolia, Asplenium umbrosum, A. tvicho- 
manes, A. ßabellifolium, Aspidium aculeatum, Polypodium Billar- 
dierii, P. tenellum, Leptopteris hymenophylloides. Most of these Sports 
had previously escaped Observation in New Zealand. The author 
also furnishes a bibliography of papers on New Zealand ferns. 
_ A. Gepp. 
Palm, Bj., Scolopendvium vulgare Sm. i Hailand. (Svensk botanisk 
Tidskrift, II. H. 2, p. 151 — 156. 1908.) 
Zu den zwei bisherigen schwedischen Fundorten dieser Art, 
Lilla Karlsö ausserhalb der Westküste von Gotland und Ardre 
im östlichen Teile Gotlands (an dem ältesten Fundorte, Oefveds- 
kloster in Schonen, ist sie ausgegangen) kommt jetzt ein dritter 
hinzu, im Kirchspiel Onsala, Hailand, wo sie von A. H. 
Magnusson in einer engen, horizontalen Felsspalte an der Küste 
