282 MISS G. L. ELLES AND MISS E. M. R. WOOD ON THE [May 1 896, 



lath-shaped fragments with a splintery fracture, 

 from it the following : — 



We have obtained 



Monograptus pandus (Lapw.). C. 



runcinatus, var. (Lapw.). C. 



exiguus (Nich.). C. 



attenuatus (Hopk.). 



crispus (Lapw.). 



hroughtonensis (Nich.). 



turriculatus, (Barr.). C. 



riccartonensis (Lapw.). 



, sp. nov. 



Hinngeri, var. nudus (Lapw.). 



, rar. jaculum (Lapw.). 



galaensis (Lapw.). 



Monograptus speciosus (Tullb.). 



cf. cygneus (Tornq.). 



priodon (Bronn). 



concinnus (?), Lapw. 



? urceolus (Richter). 



Petalograptus ovatus (Barr.). 



palmeus (Barr.). C. 



Biplograptus tamariscus (Nich.). 



Hughesii (Nich.). 



Setiolites Geinitzianus (Barr.). 

 obesus (Lapw.). 



Strictly speaking, this band might be divided as follows : — 



(a) Graptolitic Shale. 



(b) Unfossiliferous Flags. 



(c) Graptolitic Shale. 



But (b) is of such insignificant thickness that for practical purposes 

 it seems better to group the three as one bed. 



It will be evident from these lists that several species of grapto- 

 lites are common to all the bands ; for example, Monograptus 

 exiguus (Nich.) and M. turriculatus (Barr.) range throughout, and 

 have been found on the same slab ; M. pandus, Lapw., and M. runci- 

 natus var., Lapw., are also commonly associated with these. 



(c) Shore-section. — The only other place where we found a 

 workable section was that seen at low tide on the shore between the 

 timber-yard and the lodge belonging to the Benarth Lunatic Asylum. 

 The section commenced just at the old landing-stage. 



The dip and strike remain constant as before, but, owing to the 

 fact that beds are denuded along their dip, they are exposed somewhat 

 farther to the south than is the case in the road. Unfortunately, 

 where we hoped to find the highest beds the section was obscured 

 by sand and shingle, and the rocks next visible were certainly 

 of Wenlock age, since they contained Monograptus priodon (Bronn), 

 M. vomerinus (Nich.), etc. 



We believe that there is a continuous outcrop of Tarannon Shales 

 from the fault (F. 2) to F. 1, the boundary-fault ; but there are no 

 good exposures, as the ground is chiefly a grassy slope. The presence 

 of these beds was therefore in most cases inferred by the disappear- 

 ance of the feature invariably formed by the Wenlock Shales. 



3. The Wenlock Shales. 



A considerable thickness of Wenlock Shale underlies the lowest 

 band of Denbighshire Grit in this district. The outcrop assumes a 

 curious form to the west, owing to the presence of the fault (F. 1) 

 and to the configuration of the ground. 



Lithologically, the beds differ markedly from the underlying 



