LOWER PALiEOZOIC ROCKS OF HAVERFORDWEST. 



483 



same has taken place, but to a less extent, on the east side of the 

 river. 



(c) Blade beds. — These succeed the Eedhill stage at Lower Slade, 

 immediately north of Haverfordwest, on the west side of the 

 Western Cleddau. They are seen by the roadside, and also in a 

 cutting near the mill. From the latter place, we have examined a 

 number of fossils presented to the Woodwardian ]Museum by Dr. 

 Hicks. To the south they are faulted against Lower Llandovery beds, 

 the fault being seen in section in the road-cutting. 



The beds consist of gritty green shales, with weathered calcareous 

 bands, very similar in lithological character to the well-known 

 Lower Llandovery beds of this district, but the fossils are to a 

 considerable extent different. Trinudeus seticornis is fairly common, 

 and has never been found in the Lower Llandovery beds of this 

 area. Many calcareous bands of this stage are crowded with 

 Phyllopora Hisingeri, M'Coy. Among the fossils at Slade are : — 



Grlauconome disticha, Goldf. 



Lingula. 



Strophomena rhomboidalis, WilcJc. ? 



Stenopora, sp. 



Grlyptocrinus basalis, M'Coy. 

 TentaciiHtes anglicus, Salt. 

 Calymene Blumenbachii, Brongn. 

 Phacops Bronguiai^ti, Portl. 

 lUffinus Murchisoui, Salt. ? 



Bo-wmanni, Salt. 



Homalonotus bisulcatus, Salt. 

 Trinucleus seticornis. His. 



On the east side of the Western Cleddau, these Slade beds occur 

 in a lane north of Crundale, dipping away from the Eedhill beds of 

 that locality, which appear to pass under them. They are there 

 very f ossiliferous, and have yielded Trinudeus seticornis along with : — 



corrugatella, Bav. 

 Leptaena sericea, Sow. 

 Orthis biforata, Schlotk. 



elegantula, Balm. 



testudinaria, Balm. 



Petraia, sp. 



Teutacuhtes anglicus, Salt. 



Phyllopora Hisingeri, M' Coy 



Calymene trinucleina, Linnrs.? 

 Orthis testudinaria, Balm. 

 Bellerophon bilobatus, Sow. 



These beds are very extensively exposed in this region, being 

 found also in the railway-cuttings at Little Hareshead and Clover 

 Hill, and in a small quarry at Dallaston. 



At Eobeston Wathen they occur above the blue-grey shales of 

 the Eedhill stage ; and on the other side of the Eobeston Wathen 

 synclinal, are seen at Benlomond Cottage, where Prof. Phillips 

 found Trinudeus ornatus, var. Caractaci (Mem. Geol. Survey, vol. ii. 

 p. 240). 



Fossils from the north side of the Eobeston Wathen synclinal are : — 



Climacograptus. 



Petraia. 



Tentaculites anglicus, Salt. 



Ptilodictya costellata, M'Coy. 



Calymene trinucleina, Linnrs. ? 



Trinucleus seticornis, His. 



Cheirurus, sp. 



From Benlomond Cottage : — 



Tentaculites anglicus, Salt. 



Lichas. 



Orthis calligramma, Balm. 



Phacops Brongniarti, Portl. 



lUgenus. 



Orthis porcata, M' Coy ? 



Leptffiua sericea, Sow. 



Strophomena. 



Bellerophon bilobatus, Sow. 



Orthis testudinaria. Balm, 

 Leptaena sevicea,, Sow. 



