550 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



Charter-House lead-mine. They probably represent several species ; 

 but my material is not sufficiently complete for distinctive com- 

 parisons. In one example the shell is slightly angulated, with a 

 more acute apex than the above, and possesses a shght carina on 

 the upper whorl, which becomes obsolete as it increases in size. 



46. Phasianella tfebinata, Stol. PL XYII. fig. 6. 



Shell conical, moderately elongate; volutions six, which are 

 slightly convex in the centre of the whorl, but slightly flattened or 

 angulated in their upper portions ; surface of the shell smooth, with- 

 out ornamentation. 



My example does not show the mouth, which Dr. Stoliczka 

 states is elongated and pointed towards the lip, the inner portion 

 of which is thin. It has been found on the Hierlatz, and more 

 rarely on the Gratzalp. 



Locality. The Liassic vein in the Carboniferous Limestone of 

 HolweU. 



47. Pleurotomaeia Mekdipensis, spec. nov. PI. XYI. fig. 24. 



Shell small, turbinated, convex; apex subacute, whorls four, 

 sutures distinct. 



Just under the suture, above the body-whorl, are two rather close 

 raised striae, below which succeeds a concave encircling depression 

 or canal ; following this the rounded margin of the whorl is also 

 finely striated ; base rather convex or angular. The striae are 

 costated by equally fine equidistant lines, which give the shell, 

 under the lens, a very pretty reticulated appearance. 



It was obtained from the Charter-House Liassic lead-mine. 



48. Pletjrotomaria Bfchi, Deslongchamps. PI. XYII. figs. 13, 14. 



Shell small, discoidal ; apex depressed ; volutions rather convex ; 

 upper surface of whorls flattened or slightly angulated towards the 

 suture, and ornamented by numerous costae, beyond which are en- 

 circling striae, which are continued on the rounded margin of the 

 larger whorl and on the base, where they surround a deep um- 

 bilicus, the striae being decussated by finer striae longitudinally; 

 aperture round*. 



It is from one of the Liassic veins in the Carboniferous Limestone 

 at HohveU. It has been found by M. Deslongchamps at Pontaine- 

 etoupe-four; and Dr. Stoliczka mentions its occurrence on the 

 Hierlatz and in the Lias of Schwaben. I am not acquainted with 

 M. Deslongchamps's figure; my example is rather more depressed 

 than that given by Dr. Stoliczka. 



49. Ptrtjla liassica, spec. nov. PI. XYI. fig. 30. 



SheU small, inflated, globose ; spire depressed ; the body- whorl 

 much enlarged ; columella extended, tapering. The surface of the 



* In the figure prominence is given to what I believe is an accidental slit or 

 fracture of the fissiiral band, and which otherwise would connect this shell 

 with ScissurcUa. 



