442 



MISS E. M. K. WOOD ON THE LOWER LUDLOW [May I9OO, 



at (6) occur numerous specimens of the typical M. JRoemeri. A few 

 yards higher up (at 7 in the map, PL XXVI), a bed is exposed, 

 crowded with specimens of Monograptus varians, M. Nilssoni, and 

 Retiolites sjoinosus. This is the only locality in the Long Mountain 

 area at which I have obtained E. spinosus, a form so abundant 



in the Builth district. Finally we 

 have light-brown mudstones con- 

 taining M. leintwardinensis var. in- 

 cipiens nov. 



(6) Lower Winnington Lane 

 Section. — About \ mile east of the 

 section just described, a good con- 

 firmatory section is shown in the lane 

 near Lower Winnington Farm, but 

 only the middle and upper beds of 

 the Lower Ludlow above the zone of 

 M. vulgaris are here laid bare. 



The lowest (10) visible consist 

 of thinly-bedded, somewhat papery 

 shales, yielding M. bohemicus, M. 

 dubius, etc. A few yards higher 

 up (11) the shales contain M. 

 varians, M. Nilssoni, and M. cri- 

 nitus, sp. nov. in abundance, the 

 graptolites almost completely cover- 

 ing the surface of the rock. Above 

 this graptolites are rarer, but M, 

 varians, M. chimcera, and M. unci- 

 natus var. micropoma occur (12). 

 Immediately below the farm the pale 

 flaggy mudstones characteristic of 

 the M. -leintwardinensis var. incipiens 

 zone come on (13). These are ex- 

 posed as far as the main road, and 

 their thickness must be at least 300 

 feet. The succeeding beds become 

 more arenaceous and graptolites prac- 

 tically disappear, their place being 

 taken by brachiopods, trilobites, etc. 

 The M .-incipiens beds are also 

 well seen in an exposure near the 

 Eose & Crown Inn, about ^ mile 

 north - east of Winnington Lane. 

 They form the highest prolific 

 graptolitiferous horizon in the dis- 

 trict ; I have, however, found a few 

 fragments of graptolites at a con- 

 siderably higher level, showing that the group of the Ehabdophora 

 certainly lingered on in this area for some time longer. The locality 



