No. 397.] REVIEWS OF RECENT LITERATURE. 81 
botanists a number of very essential facts. The present * Notes " 
deal with four specimens of Lepidodendron Aarcourtii and Halonia 
regularis, which the author regards as specifically identical; and 
with a new genus of Cycadofilices to which he assigns the name of 
Megaloxylon, as represented by a single species, M. scottii. 
DP? 
Matonia pectinata.' — In an important contribution to the //o- 
sophical Transactions of the Royal Society, which gives evidence of the 
most searching care, Mr. Seward selects Matonia as representing an 
isolated type of ferns requiring further examination anatomically, in 
order to determine its relations to the Cyatheacez and Gleicheniacez, 
toward which it has been customary to assign it an intermediate 
position. Mr. Seward concludes that while the genus must hold an 
independent position among ferns, its affinities are most nearly with 
those of the Cyatheacez. His studies of existing species are designed 
to have a direct bearing upon the geological history of the Matoni- 
nez, and he therefore brings into comparison Laccopteris and Mato- 
nidium in particular; from all of which he concludes that Matonia 
represents the survival of a family of ferns now confined to a few 
localities in Borneo and the Malay Peninsula, and represented by 
two living species, which in Mesozoic time had a wide geographical 
range, being especially abundant in the European area during the 
Jurassic and Lower Cretaceous times. The apparent absence of 
the Matoninez from Tertiary formations suggests that these forms 
reached their maximum development in the Mesozoic, and that 
toward the close of the Cretaceous a decided restriction in geo- 
graphical range had developed. DHPP. 
Medullosa anglica.?— Dr. Scott's important contributions to our 
knowledge of the Cycadofilices have been recently enlarged by the 
description of a new species of Medullosa to which he assigns the 
name of M. anglica. He points to the fact that several genera such 
as Noeggerathia, Medullosa, Cladoxylon, Lyginodendron, Heteran- 
gium, and Protopytis are now to be grouped under Potonie’s con- 
1 Seward, A. C. The Structure and Affinities of Matonia pectinata, R. Br., 
Paleozoic Rocks. III. Medullosa anglica, a new representative of the Cyca- 
dofilices, Phil. Trans. Roy. Soc., Ser. B, vol. exci (1899), pp- 81. 
