216 Proceedings of the Royal Fhijsical Society. 
mean annual temperature of the lower portion of the county, 
embracing a series of years, may be stated at 47-2 Fahr. ; 
the rain-fall 24-6 inches. The mean annual temperature of 
the city of Edinburgh, for the last three years previous to 
1860, is 48°-3 Fahr., by the lists of the Meteorological So- 
ciety. This is equal to if not higher than the annual tempe- 
rature of any of the Scottish towns, and only 2^ lower than 
London. The annual rain-fall at Greenock, on the west 
coast, is two-thirds more than that of Mid-Lothian. Mr 
Khind concluded by recommending to the members of the 
Society, of whom there were several eminent in the various 
departments of natural history, to combine their labours in 
a complete investigation of the physical history of the 
county. We owe much, he said, to the labours of our pre- 
decessors in this respect ; and it is but just that we should 
endeavour to do something for those who are to succeed us. 
A vote of thanks was unanimously given to Mr Ehiud 
for his address, and his valuable services while President 
of the Society, his term of service having now draw^n to a 
close. 
The Secretary was instructed to engross in the minutes of 
the meeting portions of the President's address referring to 
the death of Mr William Oliphant ; and to send an extract 
of the minute to his widow, Mrs Oliphant, as a mark of the 
Society's respect for the memory of its late member and 
office-bearer, and of sympathy with her in her bereavement. 
The following communications were then read : — 
I. Observations on British Zoophytes and Protozoa. 
(1.) Notice of Ophryodendron abietina (Corethria sertulariae). (2.) On the 
Reproductive Syst&ra of Chrysaora. By T. Strethill Wright, M.D. 
(1.) On Ophryodendron ahietma. — Amongst the lower 
classes of animals, and especially in the Protozoa, the lowest 
class, numerous and very striking examples of homomor- 
phism occur. " Homomorphism " is an exact simi- 
larity in form between animals of different classes, without 
any corresponding resemblance in their anatomical struc- 
ture. Some of tliese examples may be considered fanciful, 
as the likeness between Lacrymaria olor and the fossil 
