274 Reports and Proceedings — 



The author called attention to what appeared to him to be a great 

 fault in the Lower Lias at the village of Low Morton, near Rugby, 

 where a sandpit is worked against the face of a steep hill to a depth 

 of nearly 50 feet. The sand in the valley, as proved by wells and 

 borings, is of great depth. Above the sandpit is a claypit, and the 

 author stated that the clay is bounded towards the sand by a highly 

 inclined face of clay, against which the sand is thrown. This face 

 of clay can be clearly traced for a distance of more than half a mile, 

 running in a S.E. and N.W. direction. If continued to the S.E., it 

 would pass close by Kilsby Tunnel, the difficulties met with in the 

 construction of which may have been due in part to a continuation 

 of the fault; whilst if continued to the N.W., it would coincide 

 generally with the valley of the Clifton Brook, the bed of which is 

 also occupied by a great depth of sand. The line of fault thus passes 

 between Rugby and Brownsover, and the author suggests that it is 

 the cause of the presence on the summit of the Brownsover plateau 

 of an extensive oolitic mass of Stonesfield-slate character. The line 

 of fault continued further would connect with the Atherstone and 

 Nuneaton fault, and agree with this in having its downthrow on the 

 N.E. side. 



3. " On a Labyrinthodont from the Coal-measures." By J. M. 

 Wilson, Esq., M.A., F.G.S. 



The fossil referred to in this paper was from the Leinster Coal- 

 measures, and was regarded as probably belonging to the genus 

 Keraterpeton of Prof. Huxley, although the outer posterior angles 

 of the skull do not appear to have been prolonged into cornua. 



4. " On Cruziana semiplicata." By J. L. Tupper, Esq. Com- 

 municated by J. M. Wilson, Esq., M.A., F.G.S. 



In this paper the author gave a detailed description of a slab of 

 unknown origin, but said to have been obtained from a workman at 

 Bangor, containing several specimens of the fossil described by Salter 

 under the name of Cruziana semiplicata. The author discussed the 

 characters presented by the fossil, the mode of crossing of those 

 specimens which crossed each other in the slab, and especially the 

 structure shown where a transverse section of the fossil was to be 

 seen, in which, when perfect, it was clearly of an elongate elliptical 

 form, with a cortical or external layer inclosing a medullary portion 

 of lighter colour. From his examination of the specimen the author 

 seemed inclined to ascribe to Cruziana an animal origin, and to re- 

 gard it rather as fossilized animal structure than as a cast of the track 

 left by the feet of some animal passing over the surface of the sand. 



The following letter was read from A. Irving, Esq., F.G.S., dated 

 High School, Nottingham, April 8th, 1875 : — ■ 



" There is at the present time a very interesting section of Rhastic 

 beds and Boulder-clay exposed in the cutting of a new railway which 

 is in process of construction from Melton Mowbray to Nottingham. 

 The distance of it from the latter place is between five and six miles. 

 In some places extensive erosion has taken place of the Paper Shales 

 of the Rhsetic series ; in others they are much contorted : in others, 

 again, the material of these shales appears to have been broken up, 



