On a Stalk-eyed Crustacean from the Carboniferous Strata near Paisley

Open Access
Publisher Website
Google Scholar
Abstract
In a paper published in the Geological Society's ‘Journal’ (vol. xiii. p. 363, 1857), I described several specimens of a Stalk-eyed Crustacean, from rocks of Carboniferous age, to which I applied the generic name of Pygocephalus , referring the genus to either the Decapodous or Stomapodous group of the Class. My friend and colleague, Mr. Geikie, F.G.S., has been so good as to draw my attention to what I believe to be another specimen of the same Crustacean, obtained by the Rev. Mr. Fraser, M.A., from one of the coal and ironstone mines in the Strath of the Clyde, about two miles from Paisley, in dark shale*, and, by the obliging permission of its owner, has placed it in my hands for examination and description. I say, I believe the new fossil to be another specimen of Pygocephalus , because, in consequence of the different position in which the present specimen is imbedded in the matrix, a strict comparison with the others is almost impossible; and my determination is based rather on general analogy of the forms than on a complete identification. While the other specimens presented a view of the ventral surface, this shows the lateral aspect of the animal, exhibiting a sideview of the carapace, of the thoracic and some of the cephalic appendages, and of the large and curved abdomen. The carapace, the lateral surface of which is convex from above downwards, is narrow and apparently truncated in front, but deep behind, its postero-inferior angle being somewhat produced, but

This publication has 0 references indexed in Scilit: