1887. | BOTANICAL GAZETTE. 303 
displayed by the prothallia; formation and development of the apical cell 
of the prothallium; continuity of the protoplasm in the cells of the pro- 
thallium ; development of the antheridium and antherozoids; absence of 
the ventral canal-cell in the archegonium; succession of the divisions of 
the embryo, and the establishment of the apical cells of its different mem- 
bers; development of the different tissues of the embryo; development 
of the leaf from the apical cell and the relation of the different tissues of the 
leaf to the segments of the apical cell; method of formation of the pinne > 
development of the stem from the apical cell; development of the spo- 
rangium. These subjects indicate the completeness of the study. A very 
interesting fact brought out is the vitality of the spores, and the ease with 
which they can be germinated. The plant can thus be had at any time 
for study. 
Iilustrationes flore insularum maris Pacifici. E. Drake Del Castillo. Fas- 
I Quarto. G. Masson, Paris, 1886-1887. 
The author proposes to issue from time to time fascicles of ten spe- 
cies; each species with descriptive text and a full page lithographic plate. 
Not all the Pacific island species are to be included, but those that are 
new, rare, or especially interesting. In the resumé of the publications 
concerning the flora of this region one is surprised at its copiousness. 
The three fascicles before us bring us thirty species, many of them new, 
and thirty plates. It is one of those works that demonstrate the highest 
possible skill of the printer and engraver, and to which one sits down as 
to a book of fine engravings. The typography, although of marvelous 
clearness, can be equaled in this country, but it is to these matchless 
European engravings that we must yield. Our artistic engravings, such 
a8 appear in Century or Harper, are line enough, but our scientific engrav- 
Ing and plate-printing, compared with that in the work lying before us, 
is dreadfully coarse. The explanation probably lies in the fact that all 
such work here must be done as cheaply as possible, and of course 1n an 
Inferior way. 
Parasitic Fungi of Illinois. IL. Ervsiphe. (Bulletin of the Mlinois 
Stat aici y ok Natit inne II,No.6.) By T.J. Burrill 
Earle. Peoria, 1887. 8°, pp. 46. Illustrated. 
The surface mildews have been elaborated in the present paper with 
the same thoroughness and discriminating judgment that the rusts re- 
ceived in the first contribution to the parasitic fungi of the stat ie 
introduction deals with their structure, development and classification, 
together with an account of the parasite, Cincinobolus. The genera oe 
illustrated after the manner of Winter in the “ Flora von Deutschland, 
and are provided with a key. 
Twenty-eight species are admitted, with full diagnoses J ciel slag 
the specimens in hand, the synonymy traced, each host with its locality 
and herbarium number given, and critical remarks appended. _The list 
€mbraces all the species enumerated by Trelease for Wisconsin (Para- 
drawn from 
é 
