Donations to the Library. 
237 
III. On the Natural History of Euglena. By T. Strethill Wright, 
M.D. 
Dr Wright stated that as far as concerned the Euglenas, 
which Dr Macadam had found in the Water of Leith, it 
was at present the general opinion of naturalists that these 
organisms belonged to the Phjtozoa, and, like plants, were 
attracted by light, and gave off oxygen gas. He stated 
that chlorophyll, or the green colouring matter of leaves, 
was found to exist largely in them. This chlorophyll, how- 
ever, was found by Angstroon, who had examined it by 
spectrum analysis, to be identical with that contained in 
confervse and other green algse, but different from the 
chlorophyll of phanerogamic plants. Dr Wright then gave 
a sketch of the physiology of Euglena. 
IV. A Specimen of the Smew, Mergus albellus, shot in Haddingtonshire ^ 
was exhibited by John Alex. Smith, M.D. 
The Smew, a fine adult male, was shot at Tynningham in 
the first week of February. Its stomach was found to be 
filled with minnows. Dr Smith was indebted to Mr Small, 
George Street, for exhibiting the specimen. Some four 
years ago another specimen of this rare visitor was shot in 
the month of January in the same locality. 
Wednesday^ March 22, 1865. — David Page, Esq., President, in the 
Cnair. 
The following Donations to the Library were laid on the table, and 
thanks voted to the Donors : — 
1. Proceedings of the Royal Society, London. Vol. XIII. Nos. 69 
and 70, 1864. — From the Royal Society. 2. (1.) On the Presumption of 
Survivorship; (2.) On the Relations, Structure, and Function of the Valves 
of the Vascular System in Vertebrata. — -By James Bell Pettigrew, M.D., 
Edinburgh. — From the Author. 3. The Canadian Journal of Industry, 
Science, and Art, New Series, No, 54, November 1864. — From the 
Canadian Institute, Toronto. 4. Jahrbuch der Kaiserlich-Koniglichen 
Geologischen Reichsanstalt, 1864. XIV. Band, Nro. 1. Jan., Feb., 
Mar. — From the I. R. G-eological Society of Austria. 5. (1.) Transac- 
tions of the Royal Society of Edinburgh. Vol. XXIII. Part 3, Session 
1863-64 ; (2.) Proceedings of the Royal Society of Edinburgh. Ses- 
sion 1863-64.- From the Society. 
