1850.] 



DAVIS ON THE NASH LIMESTONl 



437 



Sow., and various species of the genus Orthis^. The beds of the 

 Lower Ludlow rock are well marked at each end of the section by 

 their fossils. In a quarry in the lane leading from Nash to Eywood, 

 I have observed Cardiola interrupta, Sow., and Orthoceras pyri- 

 forme, Sow., and in the quarry on Stapleton Hill opposite Badland's 

 Cottage, vast quantities of Graptolitkus Ludensis, Murch., and Tere- 

 bratida navicula. Sow., occur in two thin calcareous bands. 



"With respect to the shale, no question has been raised as to its 

 being the equivalent of the "Wenlock. In fact, the inference which 

 has been drawn, that the Nash limestone is the equivalent of Woolhope, 

 is derived in a great measure from the position of the Wenlock shale 

 above it. The fossils of the shale at the Sandbanks on the Presteign 

 side of the hill are — 



Bumastus Barriensis, Murch., fragments 



of which occur in great ahundance. 

 Asaphus caudatus, Brong. 



longicaudatus, Murch. 



Calymene variolaris, Brong. 



macrophthalraa, Brong. 



Blumenbachii, Brong. 



tuberculata (?), Murch. 



Cheirurus bimucronatus, Murch. sp. 



Illaenus ? 



Merita spirata, Sow. 

 Euomphahis rugosus ?, Sow. 

 funatus, Sow. 



Orthis elegantula, Dalm. (0. canalis, 



Sow., Sil.Syst.)\ 

 Terebratula crebricostata, Sow. 

 reticularis, Bronn. (Atrypa affinis, 



Sow.) 

 Orthoceras canaliculatum, Sow. 



Brightii, Sow. 



Acrocuha, n. s. 



Natica spirata {Sil. Syst.) ? 



Spirifer trapezoidaUs, Buch (Sil. SgsL). 



Turbinolopsis bina, Lonsdale. 



Porites pyriformis, Lonsdale. 



GraptoUthus Ludensis, Murch. 



Creseis ? 



Of the Trilobites, the Bumastus and Asaphus caudatus, Brong., 

 are by far the most abundant. 



The shale at Nash contains fragments of Calymene Blumenbachii, 

 Brong., Asaphus caudatus, Brong., and some uncertain species of 

 Trilobites. The C. Blumenbachii occurs in great abundance. The 

 same Creseis that occurs at the Sandbanks is met with here. 



The fossils of the limestone at Nash and Woodside are — 



*Nerita spirata, Sow.X 



Mytilus mytihmeris ? 

 *Pentamerus Knightii, Sow. 



Terebratula nucula ?, Sow. 

 * lacunosa, Sow. 



CapeweHii, Davidson. 



* crispata, Sow. 



imbricata ?, Sov^, 



Orthis canaHs, Sow. 



orbicularis, Sow. 



rustica, Soiv. 



pecien, Dalm. 



Spirifer trapezoidalis, Buch. 



*Atrypa affinis, Sow. (Terebratula re- 

 ticularis, Bronn.) 



hemisphairica. Sow. 



linguifera. Sow. 



* compressa, Sow. 



Leptsena depressa, Dalm. 



euglypha, Dalm. 



* lepisma. Sow. 



transversalis ?, Dalm. 



Orbicula striata ?, Sow. 



Orthoceras vertebrale, Hall. 

 * annulatum, Sow. 



* The specimen of Buccinum ? fusiforme, Sow., figured in Murch. Sil. System, 

 pi. 20. fig. 19, was discovered by me in this locality, where I have since found a 

 second and larger specimen of this fine fossil. 



t This is the Upper Silurian form : see De Vern. Geol. of Russia, p. 188. 



X The fossils marked with an asterisk * are noticed by Sir R. Murchison as 

 occurring at Nash. The others I have found since the pubhcation of the ' Silurian 

 System.' 



