554 Reports and Proceedings—Duke of Argyll’s Address. 
Ovatz REtTICULATEH: N. Deyeri, sp.n., Blackdown ; N. arduennen- 
sis, Orb., pumila, var. nov., Gault. 
Group Impressz. 
N. albensis, Orb., Gault; N. impressa, Sow., Blackdown; N. Cor- 
nueliana, Orb., Neocomian ; N. simplex, Desh., Neocomian. 
Group ANGULATH. 
ANGULATH PECTINATH:—WN. pectinata, Sow., Gault; N. pectinata 
crete, sp.n., Grey Chalk; N. bivirgata, Sow., Gault; N. aniti- 
quata, Sow., Blackdown. 
ANGULATH LEVIGATA :—N. gaultina, sp.n. 
Of the genus Leda uo formal grouping was proposed ; ten British 
Cretaceous species were described. In conclusion, the author 
discussed the stratigraphical distribution of the two genera. 
EpinsureH GrotocicaL Society. JUBILEE MEETING. 
Address delivered at the Science and Art Museum, Edinburgh, 
before the Members of the Eprnpuren GerotoetcaL Society, by His 
Grace the Duke of Argyll, K.T.; D.C.L.(Oxon.); Trust Brit. Mus. ; 
F.R.S; Hon. V.P. R.S. Edin.; F.G.S8.; on Thursday, November Ist, 
1883, at 8 o’clock,—David Milne-Home, Esq., M.A., F.R.S.E., F.G.8., 
President, in the Chair. (Bemg the 50th Anniversary of the Society.) 
After some introductory remarks, the Duke of Argyll, who is the 
Patron of the Society, continued as follows :— 
Fifty years is but a fragment of time in the history of many 
sciences; but it is a whole age in ours. It is only two years more 
than the half century since Smith, who has been called the Father 
of Geology in England, received the Wollaston Medal for his grand 
discovery that each series of rock marking each geological age was 
distinguished by separate and peculiar forms of life. Yet this may 
be said to have been the foundation-stone of geology as a real science. 
Far more than half of all we know about it has been gained since then. 
Whole epochs in the history of creation—epochs of immense duration 
and of immense fertility m the development of life—have since then 
first risen into view. The very names by which we now know them 
have been since invented. Words which are now household words in 
all the homes of science were then unheard of, or heard of only in 
some different sense by the learned or the curious in some local history. 
Allow me to illustrate this by a curious personal recollection. Most 
of you probably know that our distinguished countryman, the late Sir 
Roderick Murchison, began his life in the army, and it so happens 
that I first heard his name mentioned just about fifty years ago. And 
I heard it in this way: A brother officer of his was an old friend of 
my father, and used sometimes to visit him at his residence, Ardincaple 
Castle, on the Clyde, where I was born and brought up. I recollect, 
as vividly as if it were yesterday, hearing that officer speak of his 
friend Murchison, almost with tears in his eyes, as a man who had 
been a most delightful comrade and companion, but one who had 
lately become lost to all agreeable society from his entire engrossment 
with some wild, wonderful new theory to which he had given the 
