On some Fossil Crustacea from the Coal-measures and Devonian Rocks of British North America

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Abstract
D r. Dawson, so well known for his researches in the Coal-measures of Nova Scotia, has entrusted to me several fragments of Crustacea from the Coal-measures and Devonian rocks of that region for description. These form a most welcome supplement to the late discoveries in Scotland, recorded in the last volume of the Society's Journal†, which Dr. Dawson could not have seen when he kindly sent these specimens for examination. Accompanying the Crustacea , there are eight specimens‡ of other fossils, of which three are shells (see further on, p. 80) agreeing closely in character with some from our own Coal-measures, and tending to confirm, if proof were needed, the age of the Crustacean fragments. They are numbered by Dr. Dawson from 1 to 5. Of these, No. 1 is most probably the abdomen of an Isopodous Crustacean, and is from a rich plant-bed in the Coal-measures of the Joggins, Nova Scotia. No. 5 is part of a large species of Eurypterus , also from the Coal-measures. Nos. 3 and 4 belong to a small species of Eurypterus , a genus already well known in the Devonian. They are from St. John's, New Brunswick. Of No. 2, from the Devonian slate of St. John's, I know no analogue, and can only guess that it has some relation to the Stomapods. It is well preserved, however, and there can be no doubt of its general structure. I have here called it Amphipeltis . I am obliged to propose new generic terms for some of these Crustacea

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