414 Miss C. A. Raisin—Rocks from Somali Land. 
Vol. II. p. 18) the author spoke of the well at Finchampstead 
Rectory as penetrating the Upper Bagshot Sands, mainly on account 
of the absence of green earthy sands in the section. In the face of 
the facts since brought to light in connexion with the stratigraphy 
of Finchampstead Ridges, this view is seen to be untenable. The 
absence of any noticeable quantity of green earthy sands in the well 
is probably accounted for by such a lateral variation of the litho- 
logical character of the Middle Bagshot beds as has been noticed in 
this paper at Wick Hill; and when this is taken into account, it will 
be seen that the relegation of the beds in the hill on which the 
Rectory stands to the Middle Bagshot does not affect materially the 
argument of the previous paper, which dealt merely with the 
question of Water Supply. It is the basement-bed of the Middle 
Group which forms the water-bearing horizon in the hill on which 
the Rectory stands, and the surrounding country is chiefly indebted 
to the clayey beds of this group for its fertility and the charms 
of the landscape. 
VI.—On Some Rock Specimens FRom Somatt Lanp. 
By Miss C. A. Ratsty, B.Sc. 
S not much appears to be known about the geology of Somali 
Land, a description of some specimens, forwarded by Col. M. — 
Gosset, and collected by Capt. King, the Political Officer at Zaila, 
may be of interest. These specimens were sent to Prof. Rupert 
Jones, who requested Professor Bonney to undertake the description 
of them. As, owing to unexpected pressure of work, he found it 
difficult to spare time for this purpose, he placed them in my hands, 
and the work has been done at University College under his 
superintendence. 
The collection of rocks was made during an expedition from 
Zaila to Mount Eilo. Zaila is on the northern coast of the Somali 
Land, and Mount Eilo lies to the south-east, on the northern frontier 
of the Gadabursi country. The account, sent by Capt. King, gives ~ 
us the following particulars of the district. The hills consist mainly 
of limestones, which are usually crystalline, and somewhat fissile. 
One variety is a fine-grained, hard, lithographic stone, which is 
grey, yellowish-grey, or reddish-brown in colour, and breaks with a 
marked conchoidal fracture. Boulders of this stone occur abundantly 
in the river-beds, and some of the slabs appeared as if they had been 
artificially quarried for lithographic purposes. A sandstone gene- 
rally of a reddish-yellow colour is associated with the limestones. 
It is hard, fine-grained, and massive, and is well adapted for grind- 
stones. The hills exhibit a ‘clearly marked stratification, and the 
beds dip usually at an angle of from 20° to 25°. 
Felspar and hornblende-bearing rocks [a porphyrite and a horn- 
blende-diabase |, and one which is greenish and compact [an epido- 
site], occur near the foot of the hills, while outcrops of mica-schist 
and gneiss are exposed in the valleys, where we find also abundance 
of fragmental quartz. 
