528 



MISS CROSFIELD AND MISS SEE AT ON THE 



[Aug. 1896,. 



The beds also occur on the eastern side of the Towy, but the grit- 

 bands do not form here such a prominent feature as on the western 

 side. In the small quarry near the beginning of the Swansea Road, 

 after crossing the river near Carmarthen, the beds are bent com- 

 pletely over, and form a small subsidiary anticline, the axis of which 

 is at right angles to the general strike of the series in the Ystrad 

 ridge ; lithologically, the beds are exactly similar to those already 

 described. The shales which overlie the grits may be seen in the 

 road-cutting for about J mile ; they are dark grey or nearly black, 

 and much contorted. In the quarry and along the road we found 

 Climacograptus ccelatus, Lapw., C. confertus, Lapw., Dendrograptus, 

 sp., cf. fiexuosus, Hall, Didymograptus bifidus, Hall, D. indentus, 

 Hall, D. Murchisoni, Beck, Lingula, and Siphonotreta micula. In 

 the small stream above the road we found Didymograptus bifidus, 

 Hall, and Ampyx, sp. 



At Cwarebach and Lower Henalt we have apparently an isolated 

 patch of beds of the same age faulted against Dicranograptus-sh&les. 

 The slates are fine-grained, bluish grey, striped with a lighter grey, 

 and well cleaved ; they yielded Dictyograptus, sp., vel Ccdlograptus, 

 sp., cf. Salteri, Hall, and Climacograptus, sp., cf. confertus, Lapw. 



A little south of Cwm Farm, near the town of Abergwili, are 

 several small quarries containing hard grey shales, gritty shales, and 

 striped flags. Here Acidaspis Buchii, Barr., 1 and Ampyx, sp., were 

 obtained. 



Table oe Possils from the Didymograptus bifidus-SHALvs, 







 3. 



- 



3 





 ts 



1 



.0 



W 



1 



1— 1 

 as 



Ho 



* 



% 



3 



% 

 j-. 



O 



3 



* 



3 



a 



— 





1 



m 



6 



X 



s 



.a 



p 



en 



5 



* 

 O 



a . 



83 S 



11 



3 



T 

 * 



?* 



* 



Didymograptus bifidus, Hall 



indentics, Hall 





# 













Murchisoni, Beck 















pattdus group 

















* 



* 





Diplograptus dentatus, Brongn 



* 















Climacograptus confertus, Lapw 

















ccelatus, Lapw 























Dendrograptus, sp., cLfiexuosics, Hall ... 























Ampyx, sp 





















* 



jEylina, sp 















* 



* 





Acidaspis Buchii, Barr 



























* 









Lingula 





















Siphonotreta micula 













































1 Kindly named by Mr. Philip Lake, F.G.S. 



