W. H. Hudleston—The Yorkshire Oolite. 391 
formations of most countries, are distinguished by the comparative 
absence of calcareous matter; while on the other hand great rivers 
like the Parana flowing from newer formations, such as the Andes, 
show by their hardness the presence of calcareous matter in the 
rocks they flow from. And further, if there never existed any great 
continent on the site of the Pacific, a still further removal of lime, in 
addition to that in organic ooze, has been continuously going on from 
the beginning of time in the form of coral growth. 
The subject is of such far-reaching importance, that I have put 
these few arguments together to enable those who differ from me 
to have the opportunity of refuting them. 
II.—ContriIBuTions. TO THE PALMONTOLOGY OF THE YORKSHIRE 
Oo.iTEs.! 
Parr III. 
By Witrrip H. Hupuzsron, M.A., F.G.S., V.P.G.A. 
(PLATES XIII. & XIV.) 
Genus Psrupomenanta, Pictet et Campiche, 1861-64, Paléont. 
Suisse, 2™° partie, Terr. Crét. de St. Croix, p. 266. (Chemmniizia, 
D’Orbigny, and Phasianella, D’Orbigny.) 
It is not proposed to discuss the merits of the generic name 
applied to a group of Univalves so characteristic of and so 
abundant in the Jurassic rocks. Melania, Eulima, and Chemnitzia 
have each of them served in turn, and in adopting Chemnitzia after 
D’Orbigny, the late Dr. S. P. Woodward observed? that the “ Melanie” 
of the Secondary rocks are provisionally referred to this genus. Pictet 
and Campiche include the Chemnitzie and Phasianelle of the Oolites 
in one genus Pseudomelania, thus preserving to a certain extent the 
old generic appellation. 
Since it is almost impossible to regard the so-called “Phasianelle” 
of the Oolites as in any sense belonging to the Turbinida, I have, 
with one exception, adopted Pictet and Campiche’s generic name for 
the several species hitherto referred to Phasianella, whilst retaining 
the provisional name Chemnitzia for the rest, so as to produce the 
least possible amount of change in our lists. 
In the Corallian rocks of Yorkshiré one well-known species of 
Chemnitzia is extremely common, whilst there are three other very 
distinct species, of which at.present only one, or at most two, speci- 
mens have as yet been found in this district. These species, with 
one exception, have been identified elsewhere. 
7.—Cuemnitzia Heppineronensis, Sowerby, 1813. Plate XIII. 
Figs. la, b, ¢, d 
Melania Heddingtonensis, Sowerby, 1813, Min. Conch., tab. 39, fig. 2. 
Bibliography, ete.—The type specimen is from the Coral Rag of 
Heddington. Sowerby gives a very characteristic figure of the shell 
in a reversed position. The peculiar bevelling of the upper part of 
the whorl is better shown than in D’Orbigny’s figures (Ter. Jur., pl. 
244), but the latter show the character of the aperture. A figure is 
1 Continued from the July Number, p. 298. 2 Manual of Mollusca, p. 126. 
