ERRATUM.
Reading edition
p. 203, line 13, for “larvas” read “lavas.”
RICHARD CLAY AND SONS, LIMITED, BREAD STREET HILL, E.C., AND BUNGAY, SUFFOLK.
TOPOGRAPHICAL AND GEOLOGICAL MAP OF NORTHERN NIGERIA Compiled by Dr. J. D. FALCONER. London. Macmillan & Co., Ltd. (Largest size: left, right)
