XS2  PROCEEDINGS  OE  THE  GEOLOGICAL  SOCIETY.  [Aug.  1 893. 
by  notes  on  the  glaciation  of  the  area.  A  brief  description  of  the 
microscopic  features  of  the  igneous  rocks  is  appended. 
8.  “  The  Rise  and  Fall  of  Lake  Tanganyika.”  By  Dr.  Robert 
Sieger.  (Communicated  by  the  President.) 
9.  “  On  Cheilostomatous  Bryozoa  from  the  Middle  Lias.”  By 
Edwin  A.  Walford,  Esq.,  F.G.S. 
The  following  specimens  were  exhibited  : — 
Rock-specimens  and  microscopic  sections,  exhibited  by  Prof. 
J.  W.  Judd,  F.R.S.,  V.P.G.S.,  in  illustration  of  his  paper. 
Rock- specimens  and  microscopic  sections,  exhibited  by  J.  Postle- 
thwaite,  Esq.,  F.G.S.,  in  illustration  of  his  paper. 
Dinosaurian  Teeth  from  Aylesbury,  exhibited  by  R.  Lydekker, 
Esq.,  B.A.,  F.G.S.,  in  illustration  of  his  paper. 
Specimen  and  section  of  Astrocoenia  gibbosa  and  section  from  the 
Society’s  Collection,  and  specimens  and  section,  exhibited  by  R.  F. 
Tomes,  Esq.,  F.G.S  .,  in  illustration  of  his  two  papers. 
Specimens  of  Astrocoenia,  exhibited  by  the  Geological  Survey  in 
illustration  of  Mr.  Tomes’s  papers. 
A  Special  General  Meeting  was  held  at  7.45  p.m.,  before  the 
Ordinary  General  Meeting,  at  which  the  following  resolutions  were 
proposed  by  the  Chairman,  seconded  by  Mr.  Topley,  and  carried 
unanimously  : — 
1.  That  it  is  desirable  that  an  Index  to  the  first  fifty 
volumes  of  the  Quarterly  Journal  be  prepared,  at  an 
expenditure  not  exceeding  <£450. 
2,  That  it  be.  issued,  if  possible,  early  in  1895,  in  two 
numbers  in  paper  covers,  uniform  with  the  Quarterly 
Journal,  and  as  a  Supplement  to  Volume  50. 
