358 Dr. C. Davison — British Earthquakes, 1900, 



Bellbrophon Euthveni, Salter. (PL XV, Figs. 5 and 6.) 



1873. Bellerophon Buthveni, n.sp., Salter : Cat. Camb. Sil. Foss. "Woodw. Mus. 



(i61). 

 1891. Bellerophon Ruthveni, Woods : Cat. Type Foss. "Woodw. Mus., p. 96. 



It is to be regretted that the four specimens on which Salter 

 founded this species are so poorly preserved and distorted. They 

 are all from the Kirkby Moor Flags of Benson Knot, near Kendal, 

 and were labelled by McCoy B. expansus (Sow.). Salter describes 

 B. Buthveni as " Smaller than B. dilatatus and with the band 

 angular, and the whorls angular where the band becomes so. Very 

 common, 1|- inch wide." The shape of the shell resembles B. expansus 

 with large expanded aperture, with inner lip bent down considerably 

 and outer lip possessing a wide acuminate V-shaped sinus. The 

 slit-band is comparatively narrow, and lies sunk between faintly 

 elevated margins. Near the aperture the whorl seems to be slightly 

 carinated and compressed, though this appearance may be due to 

 crushing in the rock. In one of the smaller specimens there are 

 traces of one or two longitudinal thread-like lines running parallel 

 to the slit-band on the surface of the shell, slightly diverging 

 towards the mouth, but no other ornamentation or surface-markings 

 are visible. The specimens are so poor that it is impossible to give 

 any satisfactory definition of the species, and it is extremely doubtful 

 in my mind whether Salter's species can stand. 



EXPLANATION OF PLATE XV. 



Fig. la. — Pleurotomaria striatissima, Salter, viewed from above, enlarged twice 



natural size. 

 Fig. lb. — The same, viewed from beneath, enlarged twice natm-al size. 

 Fig. le. — Side-view of same, enlarged twice natural size. 



From the Lower Ludlow of Dudley. 

 Fig. 2. — Pleurotomaria striatissima, Salter, natural size ; from the Lower Ludlow, 



Leintwardine. 

 Fig. 3. — Pleiirotomaria reniformis, Salter, natural size; "Wenlock Limestone, 



Dudley. 

 Fig. 4. — Trochonema bijugosa, Salter, enlarged twice natural size; Wenlock 



Limestone, Dudley. 

 Fig. 5. — Bellerophon Euthveni, Salter (side-view), natural size; Kirkby Moor 



Flags, Benson Knot, Kendal. 

 Fig. 6. — The same (carinal aspect), enlarged twice natural size ; same locality. 



VI. — On the British Earthquakes of 1900. 



By Charles Davison, D.Sc, M.A., F.G.S. 



(WITH A MAP.) 



DUEING the past year there were only two undoubted earth- 

 quakes in this country. Some may have occurred in Glen Garry, 

 one of our most sensitive regions ; but the construction of a new 

 railway through the valley renders it difficult to identify true 

 earthquakes with certainty. The total number of British earth- 

 quakes during the last twelve years thus amounts to 116, of which 

 46 had epicentres in England and Wales and 70 in Scotland, 42 of 

 the latter number being confined, or almost confined, to Glen Garry. 



