An Actinoceras from north-west Australia
Abstract
[No abstract is given, the work begins as follows] I am not aware that this interesting genus has so far been recorded from the Carboniferous rocks of West Australia. A rather fine example exists in our collection from the Lennard River, less the oldest and youngest chambers of the shell, and unfortunately it has been crushed, more particularly in the upper portion of the specimen. The length is six inches, and there are within this space nineteen or twenty chambers, the upper with a breadth of one-quarter of an inch, and the lower a trifle less. At both ends the large beaded siphuncle is visible, above in the round, below in partial cross-section.
