792 JURASSIC OF THE SOUTH WALES DIRECT LINE. [ Nov. 1902. 
of lenticular patches of clay and sand, with a fauna re- 
sembling that of the Bradford Clay. 
(ix) The great thickness and monotonous character of the Forest 
Marble. 
(x) The characteristic development of the usual zones of the 
Oxford Clay. 
Discussion. 
The Rev. H. H. Winwoop regretted that so many papers were 
crowded into one evening, necessarily restricting discussions often 
of greatimportance. However admirable an abstract might be, 
yet in the absence of the writers of the papers it was impossible 
adequately to appreciate their work. In the present instance 
he was debarred from asking several questions respecting the 
conclusions resulting from the careful work of the Authors on the 
railway-line cut through these most interesting Jurassic strata. 
He would, however, suggest that further evidence was required, 
than the finding of Terebratula digona, to establish the existence 
of Bradford Clay in tne Acton-Turville section. He hoped that 
the term ‘ Cotteswold Sands’ would give place to the old name 
‘ Midford Sands’; and called attention to the fact that a large amount 
of water (owing to the sinking of Shaft No. 6 through the Oolites 
to the Lower Liassic Clays) now ran westward instead of east- 
ward, suggesting that this might affect the head-sources of the Avon 
at no great distance, near Didmarton. 
The Rey. J. F. Braxe said that he could only comment on the 
paper from a general point of view, not having been able to visit 
the section; but this he was glad to do, as it was important to 
have on record this continuous section along a new line, by such 
competent observers, who appeared to have obtained ample data 
for the discussion of the sequence. 
If the paper, as read, told of all the principal fossils obtained, it 
was remarkable how varying a development the lower part of 
the Jurassic Series showed from place to place. The fossils might 
occur in their right order, but it was impossible to contend that 
all the zones were distinguishable. Above the Bucklandi-Beds 
the series seemed incomplete, and the Middle Lias showed no 
Spinatus-Beds ; and, what was more remarkable, there were no 
Serpentinus- Beds in the Upper Lias, which yielded only Ammonites 
communis and Aimm. bifrons. Then, in the Inferior Oolite, there 
was only the lowest zone of Amm. opalinus. 
With regard to the beds above the Inferior Oolite, it did not 
appear whether the so-called Great Oolite represented the true 
Oolite of Bath, or was only correlated with it ; and the speaker felt 
that too little was known of the distinctive faunas of this part, to 
permit of the separation of a Bradford Clay and Forest Marble, 
except by position and lithology. 
1 This feature has been previously noted in the Minchinhampton district, 
Mem. Geol. Surv. ‘Jurass. Rocks’ vol. iv (1894) pp. 271-72, and in the 
Corsham district, did. p. 356. 
SE a. 
