320 REPORTS ON THE STATE OF SCIENCE, ETC. 
8701. 34°39. Helmsdale, Kimeridgian Discordance between boulder 
section. bed and underlying shale. 
8702. 34°40. Helmsdale, Kimeridgian Giant boulder of O.R.S. in 
section. Kimeridgian. 
8703. 34°41. Helmsdale, Kimeridgian Giant boulder of O.R.S. in 
section. Kimeridgian. 
8704. 34°45. S. of Helmsdale. ‘ Cloud burst ’ effect. 
IRELAND. 
DongEGAL.—Photographed by W. J. McCa.ign, D.Sc., The University, 
Glasgow. 
8705. A. Fahan, Lough Swilly. Fahan slates, bedding dipping 
left to right, cleavage vertical 
but folded. 
8706. B. Culdaff. Slates showing cleavage and 
bedding. 
8707. C. Culdaff. Spheroidal weathering in coarse 
grit. 
8708. D. Culdaff. Bedding of slates dips gently, 
cleavage steeply from left to 
right. 
8709. E. Culdaff. Isoclinally folded limestone bed 
in slate. 
8710. F.  Portaleen. Recumbent fold in Dalradian 
schist. 
8711. G. Fahan, Lough Swilly. Slates showing cleavage and 
bedding. ; 
ARTEMIA SALINA. 
Report of the Committee appointed to investigate the progressive adaptation 
to new conditions in Artemia salina (Diploid and Octoploid, Partheno- 
genetic v. Bisexual) —(Prof. R. A. FisHer, F.R.S., Chairman ; Dr. F. 
Gross, Secretary ; Dr. J. Gray, F.R.S., Prot. J. S. Huxiey, Sec. ZS., 
Dr. E. S. RussELt, O.B.E., Prof. D. M.S. Watson, F.R.S.). 
Tue following forms of Artemia salina have been tested for resistance 
against sodium arsenite: Diploid-bisexual races from California (C), 
from Formentera in Spain (F), and from Cagliari (Cg) ; octoploid-partheno- 
genetic forms from Estang de Berre (E),and from Marguerita di Savoia (M). 
The experiments were conducted under environmental conditions, 
which were kept as constant as possible with regard to room temperature, 
food—a pure culture of a marine Chlamydomonas spec.-purity of glass 
dishes, culture medium (‘ Erdschreiber ’ = sterilised sea-water + 2°5 per 
cent. soil extract + small amounts of NaNO; and Na,HPO,), etc. 
The animals were kept in pairs, or singly in the case of parthenogenetic 
females, and the nauplii at the age of 1-4 days were transferred for 24 hours 
into 95 cc. culture medium + 5 cc. of a vivid green Chlamydomonas culture 
+ different amounts of an =; N sodium arsenite solution. After 24 hours 
the surviving nauplii were counted, washed in sterile sea-water and then 
