12 Johns: The Yoredale and Pendleside Series. 
the massif by several hundreds of feet of shales. An investiga- 
tion of the ground between Hooks Cliff of Pendle Hill and the 
knolls of White or Clitheroe Limestone gave an apparent 
succession from the knoll through platey limestones (probably 
faulted) with Prolecanites compressus through a considerable 
thickness of shales to the Pendleside Limestone, in which oc- 
curred a grey limestone with brachiopods and a coral. It was 
understood that the Posidonomya becheri beds were at the base 
of the shales, but the fossil was not seen. If this be the true 
succession, and the position of the becheri beds as stated, then 
the correlation first suggested by Dr. Marr and since by the 
writer would be correct, and the equivalence of Yoredales and 
Pendlesides would be demonstrated. Further consideration 
Suggests that in such a disturbed area as that near Pendle Hill, 
the observed succession might only be apparent, and as the 
exact relation of the Pendleside fauna to the Pendleside Lime- 
stone is not clear, no insistence on the correlation of Ingle- 
borough and Pendle Hill will be made in this present paper, nor 
will Pendle Hill be accepted, for the same reasons, as a type 
section of the Pendleside Series. An appeal will be made 
instead to evidence within the Yoredale area, and to notices 
of such other evidence as throws any light upon the problem. 
In the important Yoredale section of Mill Gill it has been 
shewn by Dr. Hind and the author that Posidonomya. bechert 
occurs abundantly in the shales at the base. The top of the 
Great Scar Limestone here is a Cythaxonia phase as is common 
in most areas at the top of the Visean. The Cephalopod fauna 
generally associated with the Pendleside Series, has not been 
observed but the sequence of Cythaxonia beds and shales with 
P. becheri is the usual one. As a solitary occurrence, this 
sequence might lose its significance if the time value of P. bechert 
was questioned. Another Pendleside form, P. membranacea, 
has never been questioned, and in the shales above the massif 
at Moor Close Gill, south of Seagate House, about two miles 
east of Gordale, near Malham, it was found associated with 
other important Pendleside fossils as follows :— 
Posidonomya membranacea, Pterinopecten papyraceus, Gly- 
phioceras diadema, and Glyphioceras reticulatum. 
Here we have two characteristic Pendleside cephalopods, 
and the objection suggested above has been met. These shales 
rest on the massif at the top of which Campophyllum derbiense, 
Koninckophyllum cf. intenusepta, and Amplexi zaphrentes 
occur. The shales themselves are unquestionably of Yoredale 
age, and the section is north of the outer Craven Fault. Further 
in the shales of Black Hill, immediately south of Fountains 
Fell, and again north of the outer Craven Fault, P. membranacea 
occurs. The shales are of Yoredale age, and rest upon the 
Great Scar limestone. Above them comes the pebbly grit of 
Naturalist, 
