369 



NOTES AND COMMENTS. 



NON-GLACIAL STRI^. 



The accompanying illustration is from a photograph of 

 an interesting section on the Sedbergh golf-course, which was 

 examined by the members of the Yorkshire Naturalists' Union 

 on their recent visit to the district. It shows the Silurian grits, 

 polished and striated, as if by glacial action. The striae, how- 

 ever, continue beneath the bed of rock shown on the right of 

 the photograph, and are evidently caused by a land-slide. 



Photo by] 



Grooved Rock, Sedbergh, looking west. 



[Dr. T. R. Burnett. 



MYTILUS CLOACINUS IN THE RH^TICS. 



In the recently issued ' Proceedings of the Bristol Naturalists' 

 Field Club,' Mr. J. W. Tutcher gives an interesting account of 

 ' The Strata exposed in constructing the Filton to Avonmouth 

 Railway ' ; with palseontological notes. In these he describes 

 and figures Mytilus cloaciniis sp. nov. from the Rhaetic bone 

 bed, Aust Cliff. In 1903 Mr. H. C. Drake, F.G.S., spent some 

 time collecting in the bone bed at Aust Cliff, and some of the 

 specimens he obtained are now in the Hull Museum. Amongst 

 them is a Myiiliis, which we have submitted to Mr. Tucher, who 

 informs us that it is the same as he describes as cloaciniis. 

 1909 Nov. I. A 2 



