Vol. 69.] 



THE GENUS AVLOVHYLLL'M. 



Locality. 







Horizon. 





Scotland. 











Linlithgow (Bathgate). 







Upper Dibunopliyllum Zone. 





Fifeshire. 







Do. do. do. 



14 



North of England. 











Northumberland. 







D„ D 2 , & D ;1; chiefly D 3 . 



2&9 



North-East Cumberland 



(country 



round 







Alston). 







D,-D 3 . 



4 



Durham (Weardale). 







I),. 







North Yorkshire (Wensleydale). 





D0-D3. 



1 



West Yorkshire (Craven 



District). 





D 2 -D 3 . 



15 



South Cumberland and North Lancashire 







(country round Morecambe Bay). 





D.,-D,. 



3 



Derbyshire. 







d;, D 2 -D 3 . 



8 



North Wales and Borders. 











Oswestry. 







Upper Dibunopliyllum Zone. 



6 



Anglesey. 







Do. do. do. 



13 



South Wales. 











Tenby. 







Di. 



10 



South- West of England. 











Bristol. 







Di. 



12&13 



Mendips. 







Da. 



7 



List of Authorities. 



(1) Garwood, E. J.—' Notes on the Faunal Succession in the Carboniferous 



Limestone of Westmoreland & Neighbouring Portions of Lancashire & 

 Yorkshire ' Geol. Mag. dec. 5, vol. v (1907) p. 70. 



(2) Garwood, E. J. — 'The Geology of Northumberland & Durham ' Geology in 



the Field. Geol. Assoc. Jubilee vol. pt. 4 (1910) pp. 671-83. 



(3) Garwood, E. J. — ' The Lower Carboniferous Succession in the North- West of 



England ' Q. J. G. S. vol. lxviii (1912) p. 449. 



(4) Herdman, T. — A forthcoming paper on the Faunal Succession in the Carbon- 



iferous Limestone Series around Alston. 



(5) Hind, Wheelton. — 'Life-Zones in the British Carboniferous Bocks' Rep. 



Brit. Assoc. 1906 (York) p. 308. 



(6) Lomas, J. — 'The Geology of the Berwvn Hills' Proc. Geol. Assoc, vol. xx 



(1908) p. 485. 



(7) Siblt, T. F. — ' On the Carboniferous Limestone (Avonian) of the Mendip Area 



(Somerset), with especial reference to the Palseontological Sequence ' Q. J . G. S. 

 vol. lxii (1906) p. 324. 



(8) Sibiy, T. F. — ' The Faunal Succession in the Carboniferous Limestone (Upper 



Avonian) of the Midland Area (North Derbyshire & North Staffordshire) ' 

 Q. J. G. S. vol. lxiv (1908) p. 34. 



(9) Smith, Stanlet. — ' The Faunal Succession of the Upper Bernician ' Trans. 



Nat. Hist. Soc. Northumberland, &c. n. s. vol. iii, pt. 2 (1910) p. 591. 



(10) Strahan, A., Cantrixd, T. C, Dixon, E. E. L., & Thomas, H. H — 



' The Geology of the South Wales Coalfield — Part X : The Country around 

 Carmarthen [Sheet 229] ' Mem. Geol. Surv. 1909. 



(11) Vaughan, A.— 'The Palasontological Sequence in the Carboniferous Limestone 



of the Bristol Area ' Q. J. G. S. vol. lxi (1905) p. 181. 



(12) Vaughan, A. — 'The Carboniferous Limestone Series (Avonian) of the Avon 



Gorge' Proc. Bristol Nat. Soc. ser. 4, vol. i (1906) p. 74. 



(13) Vatjghan, A. — ' Faunal Succession in the Carboniferous Limestone (Avonian) 



of the British Isles' Rep. Brit. Assoc. 1908 (Dublin) p. 267. 



(14) Vaughan, A. — 'Faunal Succession in the Lower Carboniferous Limestone 



(Avonian) of the British Isles' Rep. Brit. Assoc. 1909 (Winnipeg) table iii, 

 facing p. 190. 



(15) Wilmore, A. — ' On the Carboniferous Limestone South of the Craven Fault 



(Grassington-Hellifield District) ' Q. J. G. S. vol. lxvi (1910) p. 639. 



