278 MISS G. L. ELLE8 AND MISS E. M. E. WOOD ON THE [May 1 89 6, 



stream. They call to mind strongly the so-called Barren Mud- 

 stones of Moffat (Lapworth, Quart. Journ. Geol. Soc. vol. xxxiv. 

 1878, p. 240) and other areas. They are about 4 feet thick, but 

 their base is not visible. 



2. Black Shale-band. — This band is composed of typical black mud- 

 stones ; it is only a few inches thick, and is much weathered, so 

 that large blocks are not obtainable. We identified the following 

 graptolites : — 



Bastrites peregrinus (Barr.). 

 Monograptus Hisingeri, var. nudus 



(Lapw.). 

 ■ Hisingeri, Yar. jaculum (Lapw.). 



Monograptus gregarius, Lapw. C. 

 Biplograptus tamariscus (Nich.). 



C. 

 Climacograptus normalis (Lapw.). 



(C=very common. c = common. R=rare.) 



3. Grey Flags. — The black fossiliferous band No. 2 is separated 

 from the band No. 4 by a foot of grey flagstones, very similar in 

 character to those found at the base of the section. 



4. Black Shale-band. — Very similar to band No. 2, but fossils are 

 rather more abundant. This band is also of inconsiderable thick- 

 ness. We have found in it the following fossils : — 



Monograptus concinnus (Lapw.). 



Hisingeri, var. nudus, Lapw. 



, var. jaculum (Lapw.). 



gregarius ? (Lapw.). 



» lobiferus (M'Coy). 



Biplograptus sinuatus (Nich.). C. 

 • Hughesii (Nich.). 



tamariscus (Nich.). 0. 



Climacograptus normalis (Lapw.). 

 C. 



5. Grey Flagstones. — These differ in no particular from those 

 already described. 



6. Black Shale-band. — This, the uppermost black shale-band that 

 occurs in the section, is by far the most important. It is exposed 

 about 3 yards from the top of the bank, below the uppermost bed 

 of grey flagstones. The bed weathers very deeply, and has a curious 

 rough fracture which renders it easily recognizable. The band is 

 richly fossiliferous, and has yielded the following graptolites : — 



Bastrites maximus (Carr.). C. 



■ gemmatus (Barr.). 



distans (Lapw.). 



Monograptus argutus (Lapw.). 



Barrandii (?) (Suess). 



concinnus (Lapw.). 



gregarius (Lapw.). R. 



galaensis (Lapw.). E.. 



jeri, var. nudus (Lapw.). 



var. jaculum (Lapw.). c. 



Monograptus lobiferus (M'Coy). 

 • spinigerus (Nich.). 



turriculatus (Barr.). E. 



Petalograptus ovatus (Barr.). 



■ palmeus (Barr.). 



Biplograptus sinuatus (Nich.). 



tamariscus (Nich.). 0. 



Hughesii (Nich.). C. 



Climacograptus normalis (Lapw.). 



(b) Marsh-section. — The beds seen in section in the bank of 

 the marsh are, as before mentioned, a continuation of those seen by 

 the stream, and here, as before, they dip steadily in towards the hill. 

 The marsh, which occupies the space between the road and the 

 bank, lies about 3 feet below the level of the road, but the ground 

 rises somewhat towards the bank. Were it not for this depression, 

 no Llandovery Beds would be seen here, as the band with JZastrites 



