281 
1914-15.] Chalk Boulders from Aberdeen, etc. 
pebbles not larger than a hazel-nut. Three were picked up in the Faroe 
Channel — one 60' 26" N., 4' 46" W., and one 60' 34" N., 4' 32" W., depth 
963 metres, the third on the eastern edge in 778 fathoms, 58' 57" N., 
0' 36" W. ; twenty were taken in one haul of the dredge in 61' 31" N., 
2' 20" W., in 1400 metres, N.W. of the Shetlands. These last were picked 
out from a heterogeneous assortment of rocks which came up in the dredge. 
The identity of those other than chalk has not been ascertained, but some 
were Jurassic, including oolites. 
G 3 (61' 31" N., 2' 20" W.). — This specimen is now indurated with finely 
granular crystalline calcite. As a result, many of the organisms of which 
the rock is built up are partly obliterated. These were chiefly spheres of 
small size, some clearly outlined, others only just distinguishable. Amongst 
them were a very few Globigerinae, Textularians, and Rotaline forms, as 
well as Inoceramus prisms. Besides these were a number of forms which 
I have before described as Radiolaria, and I still think they are these 
organisms, though nothing is left but an outline in calcite clearer and more 
coarsely granular than the matrix. Fig. 1 in my paper* is the most 
common, but the outline of the Dictyomitra of the Belhelvie specimens 
occurs, also others which appear to be spined. The general aspect of the 
rock is curiously like, almost identical with, that of nodules which I have 
picked from the Melbourn Rock of Hitchin. Analysis of the specimen 
proved it to be very pure chalk, with a residue of only '780 per cent. The 
heavy residue of only ’018 per cent, consisted of minute sand grains, 
fragments of Rhizammina, Ammodiscus, and some pieces of the same 
vegetable structure as occurs in the Belhelvie specimens. 
G 12 (61' 31" N., 2' 20" W.). — Very similar to the last. Spheres rather 
less abundant, but more clearly marked. Thick-shelled Glohigerina of 
large size, fragments of Inoceramus shell, many large enough to show their 
prismatic structure, occur. They are such as may be found in the lower 
part of the Middle Chalk. A few of the Radiolarian forms can also be seen. 
G 1 (61' 31" N., 2' 20" W.). — Similar rock in which the organisms, 
chiefly spheres, are well preserved and fairly numerous, small Globigerinae 
and Textularians occur. One or two angular prisms of Inoceramus. 
G9 
G 5 
G 7 60' 26 
G 8 60' 34 
61' 21" N., 2' 20" W. 
Chiefly amorphous calcareous paste. 
Spheres and cells are scattered evenly 
through the rock, small Globigerinae and 
Textulariae occur with a few shell frag- 
ments. No Radiolaria, spicules rare. 
* “ Radiolaria in Chalk,” Q.J.G.S., li, 1895, pi. xxii. 
N., 4' 26" 
N., 4' 32' 
W. 
W. 
