I. On Involutina liassica (Nummulites liassicus, Rupert Jones)

Extract

In the ‘Annals and Magazine of Natural History’ for October, 1853 (2 ser. vol. xii. p. 272), there appeared a short memoir on the Lias at Fretherne (Gloucestershire) by the Rev. P. B. Brodie, and to it is appended a Note by Mr. T. Rupert Jones relative to certain Foraminifera which had been obtained from that formation. One of these Foraminifera, an organism of some interest and importance in a palæontological point of view, was partillay described by Proffessor Jones in the Note alluded to, with the provisional name Nummulites liassicus. The general from of the sheel is similar to that of the Nummutlite, though its average size is somewhat less than even the smaller fossil varieties of that genus; and the way in which the specimens are crowded together in some portions of the strata, as though the rock was almost composed of them, may have suggested by its appearance an analogy to the Nummulites in the Nummulitic limestone.