418 THE AMERICAN NATURALIST. [ VoL. XXXV. 
Darwin, all of whom contributed matter of botanical or horti- 
cultural interest to the earlier volumes of the journal, which, though 
agricultural in name, has always been of interest and value to the 
botanist. 
The double number of the Botanische Zeitung (Abtheilung I) for 
December 1 is devoted to Brunfels, a botanist of four hundred 
years ago. 
The Fern Bulletin for January opens with a portrait of Professor 
Underwood. 
PALEONTOLOGY. 
Dean's ‘t Palzontological Notes.’?! — This elaborate memoir of 
upwards of forty pages, six plates, and eighteen text-figures, is one 
of the most important contributions to the literature of Devonian 
Arthrodires that has yet appeared in this country. It has for its 
twofold object a minute description of the skeletal structures in 
Mylostoma, Stenosteus, and Selenosteus (the last two being here 
made known for the first time), and a discussion of the characters 
and relationships of the whole group of Arthrodires, with the impro- 
vision of a new system for their arrangement. 
Four of the quarto plates are admirably lithographed by the 
author from original specimens; the other two are from photo 
graphs. Not the least valuable and suggestive feature is the inter- 
spersion throughout the text of numerous diagrams showing the 
arrangement of plates in the cranial, dorsal, and ventral armor of 
different genera of Arthrodires. Restorations of this nature are not 
only useful for the graphic information they convey, but they afford 
an extremely convenient means of comparison. The interesting 
modifications displayed by Mylostoma and Dean's two new genera, 
especially as regards their dentition, constitute a welcome addition 
to our knowledge of this group. Owing to their poor preservation, 
the difficulty of deciphering the détails which the author has pains- 
takingly worked out and skillfully reconstructed must have been very 
great, and obviously none but an expert could have succeeded. 
1 Dean, Bashford. deepen Notes. I, On Two New Arthrodires 
from the Cleveland Shale of Ohio; II, On the Characters of Mylostoma, New 
berry; III, Further Notes on ú Relationships of the Arthrognathi. Mem 
N. Y. Acad. Sci., vol. ii (1901), pt. iii. 
