Description of a new fossil Thecidium (Thecidium Adamsi) from the Miocene Beds of Malta

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Abstract
Amongst the many mteresting fossils occurring in the lower part of the calcareous sandstone of Malta, there is a beautiful little Thecidium; and as I believe it has not yet been described or named, it may be worthy of a brief notice. It appears to me that the nearest ally to the little Shell which I am about to describe is the recent Thecidium Mediterraneum . The species about to be described is, however, very much smaller, being only ⅙th of an inch in length; besides which many other decidedly specific differences present themselves on closer inspection. As to its general figure, it much resembles a horse's hoof in miniature, the fixed ventral valve corresponding to the unguis or body, the hinge-area to the soft posterior part of the “frog,” and the dorsal valve to a shoe-plate. This comparison gives a good idea of the obliquity of the shell in the longitudinal plane, the great depth of the ventral valve, and its lengthened surface of attachment (figs. 1–3).

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