Vol. 58. | ASSOCIATED BEDS OF THE MALVERN HILLS. 93 
Midsummer Hill, the development of the series in the several 
localities is usually somewhat different in one or more respects, 
such as the prevailing nature of the matrix, the variety of pebbles, 
or the relative proportions of quartzite and conglomerate. Thus in 
Winter Combe, on Raggedstone Hill, the prevailing rock is a pebbly 
grit, of tolerably uniform character, the pebbles of which are of 
less varied character than those seen at the northern end of Mid- 
summer Hill. On the western side of Raggedstone Hill quartzites of 
a light colour, and containing Hyolithus, arefound. At the southern 
end of the same hill, greyish-white quartzites are interbedded with 
Hollybush Sandstone. These facts are of importance, inasmuch as 
they either point to rapid horizontal change, or more probahly 
suggest that we are dealing with dislocated fragments of a series 
originally of considerable thickness. 
It is difficult to say what the original thickness may have been. 
The little patch on Winter Combe consisting chiefly of grit can 
hardly be less than 50, and is probably more than 65 feet thick.' 
The thickness of that portion of the series of quartzites, grits, and 
conglomerates which crops out at the northern extremity of Mid- 
summer Hill may be as great as 200 or 300 feet; but the difficulty 
of ascertaining the exact disposition of the beds, makes this estimate 
very uncertain. It seems probable, however, that the formation 
was originally comparable in development with the quartzite at the 
base of the Cambrian Series in Shropshire, or possibly even with 
the still thicker Lower Quartzites of the Nuneaton district. 
(c) Paleontology. 
Fossils are not common in the series in most places. Symonds 
speaks of an Obolella,* and Murchison records the following :— 
Obolella Salteri, Orthis lenticularis, Ctencdonta sp., Theca sp., Ser- 
pulites fistula, and Scolithus sp.* 
No specimens recorded as from the ‘Conglomerate’ appear to 
occur in the existing collections, but a few labeiled as trom the 
‘Hollybush Sandstone’ may be seen at Oxford, Cambridge, South 
Kensington, and Worcester. ‘They include Kutorgina cingulata 
var. Phillipsit nov., and Obolella (7?) Groomi, sp. nov. These spe- 
cimens, however, are embedded in a quartzite which is precisely 
like that of Raggedstone Hill (M244) or Midsummer Hill (M170) 
The same may be said of a specimen of Hyolithus (Serpulites) 
fistula (Holl)? preserved in the Woodwardian Museum. The 
subject has been thrown into confusion, apparently owing to the 
circumstance that, although Holl distinguished between the Holly- 
bush Sandstone and the basal Conglomerate (= Malvern Quartzite), 
collectors have referred indiscriminately all the fossils collected 
to the former. Moreover, Holl, I believe, included under the 
name ‘felspathic sandstones’ rocks belonging in part to the 
1 See Quart. Journ Geol. Soe. vol. lv (1899) fig. 14, p. 146. 
* “Old Stones’ 2nd ed. (1884) p. 24. 
% * Siluria’ 4th ed. (1867) App.-p. 541. 
