ME.  HOENEE  ON  THE  ALLUVIAL  LAND  OF  EGYPT. 
89 
Hekekyan  Bey,  in  his  anxiety  to  fulfil  my  instructions  that  every  variety  of  the  allu- 
vial soil  passed  through  in  the  pits  should  be  noticed,  carefully  distinguished  minute 
difierences  in  composition  and  colour,  and  sent  specimens  of  all  the  varieties  he  de- 
scribed. Although  there  are  in  fact  only  two  classes,  what  may  be  termed  loams  and 
sands,  I have  thought  it  advisable  to  preserve  in  the  sections  Hekekyan  Bey’s  minute 
distinctions.  I have  added  to  the  above  Table  the  local  names  which  he  has  supplied, 
as  they  may  prove  useful,  should  future  geologists,  directing  their  attention,  as  I trust 
they  will  do,  to  the  same  subject,  chance  to  see  this  memoir. 
In  the  sections  of  the  borings  across  the  valley  in  the  parallel  of  Heliopolis,  given  in 
Plates  IV.  and  V.,  the  letters  used  as  signs  of  the  different  soils  do  not  indicate  the 
same  varieties  as  in  the  preceding  Table ; they  are  as  follows : — 
Argillaceous  earthy  sediments,  more  or  less  mixed  with  sand.  QuMrtzose  sands. 
A.  Yellowish  brown  earth. 
H.  Yellow  desert  sand. 
B.  Light  brown,  argillaceous  earth. 
I.  Yellowish  brown  sand. 
C.  Light  brown,  sandy  earth. 
K.  Brown  sand. 
D.  Brown  sandy  earth. 
L.  Light  grey  sand. 
E.  Dark  brown  earth. 
M.  Grey  sand. 
F.  Bluish  dark  brown  earth. 
N.  Bluish  sand. 
G.  Keddish  brown  earth. 
