These cases detail the important features of intraneural ganglion cysts of the tibial nerve and document the clinical utility of incorporating the unifying (articular) theory for the surgical management of tibial intraneural ganglia in adults and children.

No abstract

While accompanying the Oxford University Hudson Straits Expedition in 1931 to Akpatok Island in Ungava Bay, North Canada, the writer found that in the horizontally bedded limestones of Ordovician age one stratum alone was graptolitiferous. This contained a vast number of individuals in all stages of development, nevertheless all of the same species. When treated suitably with acid, specimens could be isolated from the matrix and thus a complete ontogeny has been worked out.

The Trilobites, which include one new species, here described were collected by the writer from Akpatok Island 1 in Ungava Bay while on the Oxford Hudson Straits Expedition in 1931. The single species of graptolite found there has already been described 2; in addition to the trilobites, there are brachiopods, corals, crinoids, gasteropods, cephalopods, and ostracods, which still await identification. The following species of trilobites are here recorded: Isotelus iowensis Owen, Megalaspis beckeri Slocom, Illaenus eucentrus Troedsson, Illaenus groenlandicus Troedsson, Bumastus sp., Calymene cf. fayettensis Slocom, Calymene cf. meeki Foerste, Encrinurus sp., Ceraurus horridus Troedsson, Ceraurus tuberosus Troedsson, Ceraurinus icarus (Billings), Ceraurinus daedalus sp. nov., Pterygometopus fredricki Slocom.

In the summer of 1931 the Oxford University Hudson Straits Expedition spent five weeks on Akpatok Island, Ungava Bay, North-Eastern Canada. It was then that the writer made notes which result in the following communication.