W. M. Hutchings — Coniston Flags at Sha/p. 459 



three nearly equidistant and narrow black rings, then a broad black 

 band which in the ventral valve is imperfectly divided into three 

 black rings by two narrow white streaks ; then a broad white lunate 

 area shading ofif into black towards the horns, and finally a broad 

 black band which, with the exception of a slight white mottling in 

 the ventral valve, extends without interruption to the frontal margin. 

 What the actual colours were in the living shell it is impossible to 

 say, but from the markings, still retained, in this solitary specimen, 

 Waldheimia perforata appears to have been a decidedly handsome 

 organism. 



Waldheimia perforata, Piette, showing original colour-markings, 

 a, front view ; b, back view. Both natural size. 



The above specimen is a full-grown and typical example of the 

 species, 23 mm. long, 20 mm. broad, and 13 mm. in its greatest 

 antero-posterior diameter. It was found by my friend Mr. J. W. 

 D. Marshall, of Bristol, in whose excellent collection of British 

 Jurassic Brachiopoda it now is, at the riverside quarry, Stout's Hill, 

 Bitton, where the species is by no means rare. The specimen was 

 not actually found in situ, but the beds from which it was undoubtedly 

 derived are usually referred to the zone of Ammonites Bucklandi. 

 From the prevalence, however, of the typical ammonite and the 

 general character of the associated organisms here as well as at 

 other places in the Bristol district, I am inclined to think that this 

 fossil comes from the zone of Ammonites angulatus. 



VII. — Notes on the Altered Coniston Flags at Shap. 

 By W. Maynakd Htitchings, Esq. 



THE alteration undergone by the Coniston Flags, owing to the 

 intrusion of the Shap granite, has been well and fully described 

 by Messrs. Harker and Marr in their most able and interesting 

 paper, read before the Geological Society in the spring of this year, 

 " The Shap Granite and the Associated Igneous and Metamorphic 

 Eocks" (Q.J.G.S. vol. xlvii. 1891). 



I have worked a great deal, microscopically, on the rocks of this 

 district, both before and since the publication of the results of 

 Harker and Marr, and this work has enabled me in a special 

 manner to appreciate the quality and value of their investigations 

 in this complicated and interesting region. I was so fortunate, two 

 summers ago as to sjDcnd some time at Shap with Mr. Marr, who 

 most kindly assisted me to understand some of the jDroblems 

 involved, and pointed out to me the places where specimens of 

 special interest could be collected. 



