148 



PKOF. T. T. GEOOM ON THE GEOLOGICAL [Feb. I9OO,. 



Cyathophyllum spp. 

 Atdacophyllum mitratum (?) His. 

 Thecia Swinderncma, Goldf. 

 Orthis (Dalma7iella) elegantula, Dalm. 



(abundant). 

 0. (Bhipidomela) hybrida, Sow. 

 0. rustica, Sow. 

 Strophomena antiqnata, Sow. 

 Str. imbrex, Pander. 

 Str. (Leptcena) rhomboidalis, Wilck. 



(abundant). 

 Str. (Strophonella) funiculata, M'Coy. 

 Leptana (Plectambonites) transversal-is, 



Dalm. 

 Pentamerus (Barrandella) linguifer, 



Sow. (abundant). 

 P. {Siebertella) galeatus, Dalm. (fairly 



abundant). 



Ehynchonella deflexa, Sow. (very- 

 abundant). 



Bh. nucula (!) Sow. 



Atrypa reticularis, Linn, (very 

 abundant). 



A. imbricata, Sow. (very abundant). 



Spirifera plicatella, Dalm. 



Sp. crispa, His. (abundant). 



Cyrtia exporrecta, Wahl. 



Betzia (?) Barrandii, Dav. (abundant). 



Meristella Circe (!) Barr. 



Orthoceras angulatum, His. 



Phacops caudatus, Briinn. 



Ph. Downingics, Murch. 



Encrinurus punctqtus, Briinn. 



Echinoencrinus armatus, Forbes. 



Crinoidea. 



Gasteropoda : three species. 



The beds on either side of the fault do not strike parallel with 

 the latter, as they should if Phillips's supposition were correct. 

 The Wenlock Limestone, which in the southern part of its course 

 has a normal dip, becomes inverted on the south side of the fault. 



Of three other faults described by Holl as affecting the Silurian 

 beds near Linden, 1 I have been able to detect only the northern- 

 most. This evidently runs down a deep depression which starts at 

 a marked indentation in the Archaean massif. Mr. Rutley repre- 

 sents it as crossing the ridge to a point near Malvern Wells. 2 

 This fault, together with the last-mentioned, detaches a strip of 

 Woolhope Limestone, the dip of which appears to be normal ; 

 while the same limestone to the north, as far as and beyond the 

 Wyche, is inverted. This latter portion of its course is traversed by 

 a third fault which, running down a small valley, also affects the 

 Wenlock Limestone. The Wenlock Limestone between this fault 

 and that which crosses the railway has a normal dip. 



A considerable thickness of shales was met with in the Malvern 

 Tunnel. These were regarded by Symonds & Lambert as repre- 

 senting both the Lower Ludlow and Wenlock Shales, separated by 

 a representative of the Wenlock Limestone. 3 This limestone is 

 described by Symonds as nearly horizontal, 4 but an appearance 

 of horizontality would result if the limestone dipped in the same 

 direction as the shales at the mouth of the tunnel, and I suspect that 

 such is the case. The authors above quoted give no measurement of 

 this limestone, but it is evidently thin ; moreover, from the general 

 disposition of the rocks of the area, I see no reason for believing 

 that the Wenlock Limestone is present at all in the tunnel. The 

 bed so termed is, in all likelihood, a calcareous band in the Wenlock 

 Shale. Holl is probably correct in mapping the whole of the beds 

 to which allusion has been made as Wenlock Shale. 5 



1 Quart. Journ. Geol. Soc. vol. xxi (1865) p. 96. 



2 Ibid. vol. xliii (1887) map facing p. 488. 



3 Ibid. vol. xvii (1861) p. 155. 



4 ' Old Stones' 2nd ed. (1884) p. 60. 



5 Quart. Journ. Geol. Soc. vol. xxi (1865) map facing p. 72. 



