Having the opportunity of revisiting Munich, I have drawn up a list of the fossils which formed the basis of the “Upper Cassian Zone,” erected by me in 1893. These fossils, when I discovered them in Falzarego Valley in 1891, were then for the most part unknown. The tuffs and breccias in which they occur had been referred by Loretz to the fossiliferous Raibl horizon of the Schlern Plateau, and by Mojsisovics to the much lower horizon of Wengen strata. I found, by careful collection from strata in position, that the fauna, in addition to a fair proportion of St. Cassian types and a few Raibl types, comprised a number of types common both to Cassian and Raibl horizons and a still greater number of species which had not been found elsewhere (Q.J.G.S., 1893, pp. 31, 44, 46, 47).

The eastern extremity of the wooded range of the Taunus, where its last spurs slope down to the Wetterau Plain and the streams from its valleys give up hurrying and wander lazily across the fertile flats towards the Main, has been a spot rich in interest since at least pre-Germanic times. The ancient Kelts, when overwhelmed by their Germanic foes, left behind them, now deep in the detritus at the foot of the Johannisberg, their hearths, chisels, and millstones, mixed up with shells and bones. In addition to these typical relics of the race, there have also been found special forms of earthen vessels, used evidently for evaporating the waters of the saline springs. The tribes described by Tacitus as being in possession at the end of the first century do not seem to have been similarly enterprising, but it is known the victorious Romans of the third century resorted thither for medicinal baths.

Preliminary remarks on the genus.—The interesting observationson the dimorphism of the genus Nummulites, which have been madefrom time to time by special investigators, such as Von Hantken, Munier-Chalmas & Sohlumberger, De la Harpe, Bupert Jones, andVan den Broeok, have resulted in the establishment of couples of so-called species, constituting a species in the zoological sense, in which the smaller form, with a large central chamber, is referred to as form A, whilst form B usually has a larger test and in variably possesses a diminutive central chamber. The two forms are other-wise spoken of as the megalospheric and microspheric forms. In some cases there may be little doubt as to the accuracy of the assignment of the two forms to one species, especially since they may be the only examples present in the rock. In the case ofa stratum containing more than two species, however, there may be no small difficulty in coupling the actual forms which constitute the species, for there is often little in either the internal or external characters to guide one in linking the forms. In our present state of knowledge, therefore, it appears to be most convenient to describe the forms under their specific denominations as already known, at the same time pointing out their relationship to one another. Some good suggestions as to the naming of Nnmmulites and other Foraminifera which exhibit the two modes of growth and shell form have lately been made by Dr. A. Silvestri.