Notes on the Distribution of the Entomostraca in the Wenlock Shales. Mr. Maw’s Washings

Abstract

In the proceedings of the Yorkshire Geological and Polytechnic Society of last year,* I gave a paper on the Palaeontology of the Wenlock shales of Shropshire, together with a list of species found in the now celebrated washings of Mr. Maw. Originally these shales, over twenty tons, were washed, for the purpose of selecting the Brachiopoda from the remaining debris , to help the late Dr. Davidson in his descriptive work on this group of organic forms. In the paper referred to I also gave full descriptions of the various horizons of the Wenlock shales, so far as supplied me by Mr. Maw, both below and above the Wenlock limestone. At the time I wrote the list was unavoidably incomplete as the Ostracoda not having been fully described by Messrs. Jones and Holl, the specific names had to be filled in from MS. notes furnished to me, subject to alterations, by Professor T. Rupert Jones himself. The notes on the Ostracoda of the shales now given, treat of the published descriptions of Messrs. Jones and the late much-lamented Dr. Holl. During the progress of the British papers, Prof. T. R. Jones received for examination in 1886 “A fine series of Ostracoda from the Silurian rocks of Gothland,” supplied by Prof. G. Lindstrom, of the State museum, Stockholm. As many of the species in the Gothland list belong to what Dr. Lindstrom designates the “Shale beds of Northern Gothland—cœval with the sandstone of South Gothland,” (No. VI., p. 8, see Bibliogr.) ...