428 MISS E. M. E. WOOD ON THE LOWER LTJDLOW [May IC)OOy 



below the limestones are not laid bare. The lowest beds seen, which 

 are about one-eighth of the way up in the succession, have yielded 

 M. bohemieus, M. Nilssoni, M. scanicus, M. chimcera, M. dubius, etc. 

 In a small quarry in the hard flaggy shales near Gorsty Farm, at 

 the top of the hill, M. tumescens and M. tumescens var. minor occur 

 in abundance and to the exclusion of other species. These beds are 

 identical with those in the Elton Lane section between I and L. 



(d) Leintwardine-Stormer Hall Koad Section. — A small 

 but richly fossiliferous exposure of the Lower Ludlow Shales is ex- 

 hibited along the roadside south of Stormer Hall (' Stanner Hall y 

 of Lapworth, etc.). This locality is of especial interest as being the 

 type-locality for M. Salweyi, Hopk. The typical form occurs here 

 in great abundance, but is seldom met with anywhere else in the 

 district. It is associated with M. dubius, M. uncinatus var. micro- 

 poma, M. colonus var. compactus, and M. varians var. a. The 

 slender curved graptolites, such as M. scanicus and M. Nilssoni, are 

 conspicuous by their absence, and it is possible that these beds 

 represent a somewhat lower horizon than those seen in the other 

 sections just described, but as there are no other exposures near by 

 it is impossible to speak with certainty. 



(e) Church Hill Quarry, Leintwardine. — This quarry, 

 now overgrown and practically inaccessible, was made in the hard 

 flags, known as l Leintwardine Flags,' which occur at the top of the 

 Lower Ludlow Shales immediately below the Aymestry Limestone. 

 It was from this locality that the type-specimens of M. leintwardin- 

 ensis, the highest British graptolite yet known, were obtained. 

 The only other localities in the district where I have found this 

 characteristic species are in the hard flags at the top of Mocktree 

 Hill and at Aymestry. In the large quarry at Aymestry I ob- 

 tained a few fragments, occurring in calcareous beds crowded 

 with brachiopods, trilobites, etc., which belong undoubtedly to the 

 Aymestry Limestone. 1 



(3) Summary. 



Judging from the field-evidence adduced in the foregoing pages, 

 it would appear that the graptolitiferous members of the Lower 

 Ludlow Shales and Aymestry Limestone in the typical area may be 

 grouped into four zones : — 



4 Zona of M leintwardinensis I 485 feet ( includin g tbe Aymestry 



4. Zone ol M. leintwardinensis j Limestone, 275 feet). 



3. „ M. tumescens 220 feet. 



r 350 feet (including the 130 feet 



2. „ M. scanicus J at the base which have yielded 



1. „ M. Nilssoni (at the base)... ] no graptolites) in the Elton- 



<- Lane section. 



1 In the Woodwardian Museum, Cambridge, there is a well-preserved speci- 

 men of M. leintwardinensis occurring in a limestone, labelled 'Upper Ludlow, 

 Brocton & Burton.' Unfortunately the exact horizon is unknown, but it is 

 probably that of the Aymestry Limestone. The graptolite is associated with 

 Strophomena depressa, Chonetes lata, and Bhynchonella nucula. 



