20 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 
greater success may result. My thanks are due to the 
Council of the Manchester University for the use of 
their Work-Table, and to Professor Herdman and 
Mr. Chadwick for the facilities granted to me at the 
Biological Station, and for their assistance and advice in 
the work I had on hand.’’ 
Dr. H. HE. Roaf made some further observations on 
the hypobranchial gland of Purpura lapillus, and reports 
as follows :— 
‘““ Sections of material fixed in various bichromate 
solutions show a brown stained substance in the region of 
the purple-forming area. Now vertebrate tissues which 
contain ‘adrenalin-like’ substances stain brown with 
bichromate fixatives. As previous chemical and physio- 
logical tests* had shown an ‘ adrenalin-like’ substance in 
the same region of the mantle where the brown stained 
material has now been found, it appears that the active 
substance is formed in the purple-producing area. It is 
hoped that the results will be ready for publication before 
the end of the year.”’ 
Dr. W. J. Dakin, who occupied the Liverpool 
University Work-Table, reports to me as follows in 
regard to his results : — 
“During the Easter vacation my time was spent 
chiefly in connection with some experiments to determine 
the osmotic pressure of the contents of plaice eggs and 
larve. The results of this investigation, which was 
supplemented by observations on dog-fish eggs, have been 
communicated to the British Association, at the Sheffield 
meeting, and will be published in full in the next number 
of the ‘ Internationale Revue d. Hydrobiologie.’ This 
“M. Nierenstein and H. E. Roaf, Journ. Physiol., Vol. XXXVI, 
Proceedings, p. v ; and C.-R. Soc. de Biol., Vol. LXIII, p. 773, 1907. 
