176 Dr. L. F. Spath — Lower Lias A mmonites from Skye. 



that the succession at this point is still above the true huchlandi 



hemera. 



Further to the north-east, nearer the point Rudha Ardnish, 



the same ^rm'oceras-b earing beds occur, the high acuticarinatus 



bed with JEtomoceras scipionianum coming up again at least 



once more at 

 A 7, with the Ammonite species found at Ax and at A 4. 



Finally, greenish-white fucoid shales and sandstones come in 



near Ardnish Point, containing 

 A 8, Arnioceratoides (gen. nov.) kridion (HehJ) Zieten sp. 



These beds probably belong to division iii of the Survey, and seem 

 to be the lowest beds in the succession, perhaps ranging as 

 low as the true bucklandi beds ; but it is significant that no 

 Coroniceras {coronaries group), Ammonites s.s. {hisulcatus group), 

 EucoRONiCERAS, gen. nov. (type A. sinemuriensis, Orbigny, 

 I.e., pi. xcv, figs. 1-3), or Megarietites were discovered anywhere along 

 the shores of Ardnish. 



The true bucklandi beds, however, seem to be developed in Morvern 

 (Loch Aline) and Mull (Craignure), though at the latter locality 

 only a fragment of a large Schlotheimia cf. thalassica (Quenstedt) 

 was discovered. The higher Arnioceras beds, farther east, towards 

 Duart Bay, again wrongly referred to the semicostatus beds by 

 Judd, apparently agiee with those in the gmuendense and 

 scipionianum zones of Ardnish, but they are strongly metamor- 

 phosed and the Ammonites are scarcely recognizable. 



The writer tenders his hearty thanks to all those who with material 

 or otherwise have helped him in the preparation of this paper. 



