No. 409.] REVIEWS OF RECENT LITERATURE. T 
Araucariez, is only known from vegetative remains, the fructification 
being quite unknown. Unmistakable Araucariee are not known 
anterior to the Jurassic. The Abietinee are probably somewhat 
more recent, but Cupressinew are found in the Jurassic. The 
Taxinez (exclusive of the much more ancient Ginkgo) are first met 
with in the Cretaceous. 
The extraordinary genus Ginkgo, which with the Cycads represents 
the oldest existing type of seed-bearing plants, and is now represented 
by the solitary species, G. biloba, is recognized by Dr. Scott as the 
representative of a distinct order, Gingkoacea, which is represented 
by numerous forms in the later Palaozoic and earlier Mesozoic 
formations. Dr. Scott agrees with Seward in assuming a somewhat 
near relationship between the Gingkoacea and the Cordaitez, 
The concluding chapter is occupied with a summary of the 
general conclusions presented in the preceding chapters. We can 
hardly agree with the conclusion that the great antiquity of the 
Pteridophytes, and the absence of the remains of Bryophytes in the 
Paleozoic formations, is a sound argument for the entire independ- 
qu st the great divisions of Archegoniates. There certainly is 
| m enience of any other forms from which they could possibly have 
orici the evidence of comparative morphology is over- 
,. emingly in favor of a common origin for all Archegoniates. The 
. Questions of their interrel 
; B um printed, and the illustrations are well 
"e gh s pful in elucidating the text. We can heartily 
ogni ee to all botanists interested in the fascinating 
E o Pope D. H. C 
