538 



W. W. WATTS 0^ THE IGjSTEOTJS AND 



Monograptus basilicus (dubius, 



■ priodon, Bronn. 



vomerinus ?, Nich. 



Calymene, sp. 

 CQCuUella, sp. 

 Ortlioceras angulatum, Hising. 



all fossils belonging to tlie Upper Wenlock. Above this the beds 

 get gradually more sandy and flaggy, as though the sea were slowly 

 shallowing. ISTear the E,ose and Crown Inn is a capital exposure in 

 these upper beds {d), concretionary brown mudstones dipping 40° S. 

 20° E., and yielding :— 



Monograptus colonus, Lapw. 



leintwai'dinensis. HopJc. 



Entomis tuberculosa, Jones. 

 Orthoceras, sp. 



These fossils belong to the Lower Ludlow rocks, and must be 

 classed with them. At the Hall Mill above this spot are brown and 

 dark-grey sandy mudstones, finely laminated, with some calcareous 

 bands (g) dipping 40^ S. 25° E. Here I have found no fossils. 



A second section runs from Coppice House, near Middletown 

 Station, through Glyn to Trefnant, and shows a very similar suc- 

 cession. At Coppice House the grey shales dip 63° S. 20° E., and 

 have yielded : — 



Monograptus vomerinus, Nich. 

 Orthoceras subundulatum ?, Portl. 



On the larger brook, where it receives tributaries from Glyn 

 Common, massive concretionary shales are exposed in a quarry and 

 have a slight dip to IST.W. In these I have found : — 



Monograptus colonus ?, Lapw. 



S'ilssoni, Barr. 



priodon, var. Flemingii, Salt. 



Orthoceras subundulatum ?, Fortl. ; 



a very curious mixture of forms, of which the first ranges from 

 Upper Wenlock to Lower Ludlow, the second belongs to the Upper 

 Ludlow, and the third to Lower and Upper Wenlock. So these beds 

 may come between Lower and Upper Wenlock. Half a mile further 

 S.E., on the brook from Trefnant, are exposures of shales, with dips 

 varying from S. 65° E. to S. 20° W. at low angles. jS'ear to Trefnant 

 these beds contain the following Lower Ludlow fossils : — 



Monograptus Nilssoni, Barr. 

 ■ Salweyi, Hopk. 



A third section runs from Llwyn-Melyn farm past Dingle Mill to 

 the County Bridge on the high road from Woolaston to Welshpool. 

 In the lane from Trewein to Dingle MiU, and in the railway-cutting 

 near Llwyn-Melyn, are the usual hard, grey, calcareous shales, very 

 concretionary and dipping S. 20° W. at 38°. They contain — 



Monograptus (like colonus, Lapw.) 

 Cardiola interrupta, Brod. 

 Orthoceras subundulatum, Portl. 



Concretionary shales dip up Dingle Brook at 28° S. 5° E., and in 



