192 MR. A. RENDLE SHORT ON RH.ETIC [May I904, 



(60) Reynolds, S. H., & Vaughan, A. 1902. ' Jurassic Strata cut through hy 

 the South- Wales Direct Line' Ibid. vol. lviii, pp. 719-52. 



(51) Richardson, L. 1903. ' Two Sections of the Kinetic Rocks in Worcester- 

 shire ' Geol. Mag. pp. 80-82. 



(52)) Vaughan, A., & Titcher, J. W. 1903. 'The Lower Lias of Keynsham' 

 Proc. Bristol Nat. Soc. n. s. vol. x, pp. 3-54 & plates. 



(53) Short, A. R. 1903. ' On the Cotham Marble' Ibid. pp. 135-149. 



(54) Richardson, L. 1903. ' The Rhaetic Rocks of North-West Gloucestershire ' 



Proc. Cotteswold Nat. F.C. vol. xiv, pp. 127-74 & pi. v. 



I In addition to the foregoing, numerous references to Rhsetic geology, etc. will be 

 found in various Geological Survey Memoirs.] 



B. — Foreign Literature. 



(55) Oppel, A. 1856-58. ' Die Jura-Formation Englands, Frankreichs, & des sud- 



westlichen Deutschlands ' [§ 1, der Untere Lias]. 



(56) Quenstedt, F. A. 1858. ' Der Jura ' pp. 25 et seqq. [Vorlaufer des Lias & 



Unterer Lias]. 



(57) Schlonbach, A. 1860. 'Das Bonebed & seine Lage gegen den sogenannten 



obern Keupersandstein im Hannover'schen ' Neues Jahrb. f. Min. &c. 

 pp. 513-34 & pi. iv. 



(58) Schlonbach, A. 1862. ' Beitrag zur genauen Niveau-Bestimmung des auf der 



Grenze zwischen Keuper & Lias im Hannoverischen & Braunschweigischen 

 auftretenden Sandsteins ' Ibid. pp. 146-77 & pi. iii. 



(59) Dittmar, A. von. 1864. ' Die Contorta-Zone : ihre Verbreitung & ihre 



organischen Einschliisse ' Munich, 8vo. 



(60) Brauns, D. 1871. ' Der Untere Jura im nordwestlichen Deutschland ' Bruns- 



wick, 8vo. 



(61) Bertrand, M., & Kilian, W. 1889. 'Mission d'Andalousie ' [Infralias] 



Mem. Sav. Etrang. Acad. Sci. Paris, ser. 2, vol. xxx. pp. 408 & 605. 



(62) Lapparent, A. de. 1900. ' Traite de Geologie' 4th ed. pp. 1053-68 [Etage 



rhe't-ien]. 



Discussion. 



Mr. H. B. Woodward complimented the Author on the clear 

 exposition that he had given of his views. The instances of inter- 

 calation of grey marl and black shale confirmed other evidence of 

 the passage between Keuper and Rhcetic, but he (the speaker) 

 doubted whether the Bone-Bed could be regarded as a definite 

 horizon. Reference might have been made to Edward Forbes's 

 view of the formation of the White Lias in an inland sea like the 

 Caspian, before depression had introduced the open-sea conditions 

 of the Lias. He did not agree with the Author in linking the zone 

 of Pleuromya Crowcombeia with the White Lias, as that fossil was 

 characteristic of the basement-portions of the Blue (Lower) Lias 

 throughout England — specimens which he had collected at Dunball, 

 near Bridgwater, were identical in all respects with others obtained 

 by "Mr. George Barrow at Northallerton. By taking the basement 

 portions of the Lower Lias into the Rhoetic formation, the Author 

 had accentuated its Liassic affinities. The White Lias had con- 

 siderable local importance, as it extended from Bath to Lyme Regis ; 

 and, as Charles Moore had pointed out, the junction with the Lower 

 Lias was usually well marked. In the Bristol area and northward 

 the White Lias appeared to be extensively overlapped, and there was 

 evidence in places of a remanie bed at the base of the Lower Lias. 



