Note 1442 — Chapter XXXIX

The genus Ptilozamites described briefly in Volume ii. has recently been fully investigated by Antevs[1443] who had access to the rich material in the Stockholm Museum from the Rhaetic beds of Scania. He thinks that the genus is intermediate between Anomozamites and Ctenopteris; its systematic position has not been definitely established but, as Antevs says, there seems to be no reason why it should not be a member of the Cycadophyta. In some species, e.g. Ptilozamites fallax Nath. and P. Nilssoni Nath., the rachis is forked, while in P. Heeri Nath. with linear fronds reaching a length of 53 cm. the rachis is undivided.