4 PROF. GROOM ON THE CAMBRIAN AND [Feb. 1902, 
Hollybush Sandstone and in part to the Malvern Quartzite. 
I think it advisable, therefore, to disregard the lists given by Holl 
and Murchison, and to rely solely on the specimens preserved in 
museums, or collected by myself. 
On the western slopes of the Raggedstone (M 244) fossils are 
abundant, in pieces of quartzite and quartzose grit. These in- 
clude, in large numbers, Autoryina cingulata var. Phillipsi nov., 
and less frequently Obolclla(?) Groom, sp. nov., and HMyolithus 
priuncvus, sp. nov., and rarely". fistula (Holl). In the more con- 
glomeratic quartzites at the northern end of Midsummer Hill 
(M170), I obtained Autorgina Phillips in the greatest abundance, 
though frequently in a fragmentary condition. With these were 
associated a much smaller number of specimens of Obolella(?) Groomit. 
The foregoing are the only fossils (with the exception of glauconitic 
casts of foraminifera) that it appears safe to attribute to the 
Malvern Quartzite. 
Ill. Tue HottysusH SANDSTONE. 
(a) Succession and Thickness. 
The Hollybush Sandstone was first observed by Murchison on 
the western flanks of the Raggedstone. He described the formation 
as composed of a pale-green, fine-grained, slightly micaceous, 
earthy sandstone, passing up above into hard flag-like and highly 
micaceous layers." The sandstone, he states, 
‘night be termed greensand with as much propriety as any rock in the 
geological series.’ 
De la Beche speaks of the same beds as 
‘greenish sandstones, in thick and thin beds, often of a trappean aspect.’ ? 
It was John Phillips, however, who gave the first detailed 
description of the series, and applied to it its present name.’ Holl 
in later years carefully studied the character of the sandstones, and 
obtained fossil remains from them.* He attempted also to establish 
a general succession of strata within the series, and distinguished on 
the northern slopes of the Raggedstone (in descending order) the 
following :— 
Beds with Trachyderina antiquissima. 
Greenish sandstones with Serpulites fistula. 
Contemporaneous lava. 
Light-coloured felspathic sandstones and speckled sandstones with 
fossils, and rather massive olive-green unfossiliferous sandstone. 
Basal conglomerate (= Malvern Quartzite). 
‘Silurian System ’ 1839, p. 416. 
Mem. Geol. Surv. Gt. Brit. vol. i (1846) p. 21. 
Ibid. vol. ii, pt. 1 (1848) pp. 51-54. 
Quart. Journ. Geol. Soc. vol. xxi (1865) pp. 87-89. 
Pe oO We 
