The land and fresh water shells of the districts around Manchester;

Abstract

Chattels ; himself is his own furniture. And his sole riches. Wheresoe'er he roam Knock when you will,-he's sure to be at home. UNIO.-ALASMODON. Unio oValis. {Gray.) Oval Unio. Shell elliptical ovate, thick, yellowish green razed, tapering behind; hinder margin slightly arched, or contracted; umhones prominent, wrinkled, often worn; cardinal teeth thick, conical, crenated/' Gray^p. 297 • Found in Dallam Brook, near Warrington and in Little Sankey Mill-pool. Here I and Messrs. Cookes, of Warrington, one afternoon, procured about one hundred specimens, but most of them were corroded at the beaks. Unio tumidus {Reizius.) Tumid Unio. Mysca Solida. {TurionT) Shell ovate elongate, wedge-shaped, tumid, produced and attenuated behind, thick, brown; lower edge curved; umbones prominent, rugose; anterior teeth thick, high, triangular, strong; left hinder strong; known from the Unio pictorum, by being much more solid, having larger and stronger anterior teeth, and by its tapering behind.'' Found in the canal at Welshpool. Alasmodon. (Say.) Pearl Muscle.

Not a Silent Invasion: The Reaction of European Naturalists to the Spread of Zebra Mussel (Dreissena polymorpha) in the 19th—Early 20th Century

“…In Manchester, thriving colonies of D. polymorpha were detected by around 1850. Dyson reported his observations on these mussels living in the pipes that supplied the city from the nearby waterworks; the mussels were also highly abundant in the reservoir that served as the source of water [54]. In the London water supplies, D. polymorpha was also recorded around 1850.…”

High-Velocity Interstellar Gas

“…He describes the work of Dyson (1966) based on the assumption that the Orion Nebula contains many globules of cool, nonionized gas. One consequence of the presence of such globules is the production of streams of ionized gas with a very nonuniform density.…”