part 4] JURASSIC cheois^ology. 449 



Appendix II — The Upper Lias Succession. By Leonard 

 Frank Spath, D.Sc, F.G-.S., John Pringle, F.G-.S., 

 Andrew Templeman, and S. S. Buckman, F.Gr.S. 



(A) Introduction. (S. S. B.) 



Some time after my paper had been sent in to the Society, some 

 important excavations were made in the Upper Lias of Somerset, 

 which throw much Hght on the points discussed in ]jp. 390-395. 

 Dr. Spath sent me a summary of the results that he had obtained 

 from a study of a collection made by Prof. D. M. S. Watson : this 

 communication is placed first, because it enters into considerable 

 detail as regards the genera and species of ammonites. Later, 

 Mr. Pringle and Mr. Templeman forwarded a summary of the 

 results of their collecting — particularly important because the beds 

 were collected from almost inch by inch, with extremely happy 

 results. They did not attempt much particularization of ammonites, 

 because their finds were placed in m}^ hands for detailed work. 

 But, although such detailed work cannot be undertaken for some 

 time, it has been possible to make a general survey of the faunal 

 succession. From this information and the study of some 

 Northamptonshire specimens submitted by Mr. Pringle at the 

 same time, it has been possible to construct succession and corre- 

 lation tables, which, although necessarily imperfect in certain 

 respects, will (it is hoped) become useful bases for further work, 



(B) Upper Lias Succession near Ilminster^ Somerset. 



(L. F. S.) 



This succession is based on material collected and submitted 

 by Prof. D. M. S. Watson, to whom grateful acknowledgments are 

 tendered. Beds 13 to 15 were collected from at Barrington, beds 

 4 to 12 at Stocklinch. The highest bed (' Top-Rock ' 13) at the 

 latter locality did not 3aeld any ammonites ; but Prof. Watson has 

 reasons for considering beds 13-15 to follow on bed 12, as in the 

 succession tabulated below. 



Strata. Horizons. 



ia) Barj'ington. 



15. ' Basement Bed of Yeovil Sands ' JDumortieria 7 to 



{Phlyseogrammoceras dispansum, JDumor- [dispanswn. 



tieria ? sp., Alocolytoceras 7 sp. juv.) 



14. ' Black Clay,' 6 inches (fauna derived) strucTcmanni 7 to 



{Sammatoceras cf. insigne ; Grammoceras [striatulum. 



spp. ; Pseudogrammoceras ? cf. grunowi 

 (Dumovtier,! uon Hauer) ; Haugia sp.; 

 v-script midoceras.) 

 13. ' Top- Rock ' {Phymatoceras? cL ivertlii) variabilis 7 



^ ' Etudes Paleontologiques sur les Depots Jurassiques du Bassin du 

 Ehone : Lias Superieur ' vol. iv (1874) pi. xiv, figs. 6 & 7, 



