284 Proceedings of the Royal Society of Edinburgh. [Sess. 
though a different horizon or area of sedimentation is suggested by the 
structure. 
G 13 is unlike any other specimen examined. Its structure is not 
unlike Chalk Rock without glauconite. 
G 2, 6, 14, 15, 16, 21. — In these specimens one seems again able to trace 
a successive series of events in the progress of sedimentation. Most of the 
specimens are small, and there was insufficient material left for analysis 
after cutting a section. In G 6 and 14 the chalk is of a kind previously 
unknown to me. From optical observation I think they are pure chalks. 
A peculiar character is given them by the large size and thickness of the 
shell of the “ spheres ” and foraminiferal cells, and the few ragged in- 
determinable shell fragments sparingly scattered through the rock. There 
are no /'Tiocemmus prisms. In G 2 and 15 the large “spheres” and cells 
are less numerous, but the same kind of shell fragments increase in 
quantity ; amongst them are small pieces of Bryozoa. The inequality in 
the distribution of these fragments suggests current action. In G 16 the 
same kind of shell fragments are abundant, and a few particles of Bryozoa 
occur. Globigerinse and Textularise with other Foraminif era are present; 
some of the tests are large bold forms. Sponge spicules are there also, but 
their siliceous walls are replaced by calcite. Though analysis shows that 
no large amount of terrigenous material is present, sand grains can be 
seen scattered through the deposit, and in the residue were found fragments 
of vegetable matter identical in structure with that of the Belhelvie boulders. 
More than two-thirds of the whole rock of G 21 consists of coarse shell 
fragments of the same ragged indeterminable type ; quite large fragments 
of Bryozoa are included with them. The Foraminif era, which are numerous, 
are Rotalian and other forms ; but there are no Globigerinse or Textularise. 
Mineral grains are large and abundant, quartz and a felspar are certainly 
present, but no mica can be detected. 
The impression created by the study of the last six specimens is that 
they represent a gradual passage from the chalk with large spheres to 
that containing many shell fragments and mineral grains. 
G 17, 18, 19, 20 are limestone consisting entirely of the fragments of 
Bryozoa. They are identical in structure with the Bryozoa limestone in 
Denmark. 
Evidence that rocks of Cretaceous age once existed in the north-east 
of Scotland is being slowly gathered. Mr Tait * has discovered fossils with 
a Neocomian facies in concretionary masses embedded in sand at Leavad. 
* “On the Occurrence of Cretaceous Fossils in Caithness,” Proc. Edin. Geol. Soc., vol. ix, 
part 4, 1909, p. 318. (See footnote, p. 264 of this paper. — J. H.) 
