PLATE II. 
Pig. 1. Profile of a right upper second true molar, No. 23,717 ^ ]3 r itish Museum, 
from Slade Green, Erith, Essex. (Half natural size.) 
Eig. 2. Crown view of a left upper last true molar, No. 28,118, British Museum, 
from Grays Thurrock, Essex. (Half natural size.) 
Pigs. 3 and 3 a. Crown and profile views of No. 47,121, British Museum, a right 
upper last true molar, from Peterborough. (Half natural size.) 
I have just been shown (January, 1877), but too late for description in the text, a 
very characteristic left upper molar, almost entire, by Professor Ramsay, P.R.S., Director- 
General of the Geological Survey, who lately discovered it in a marine deposit near the 
sea-gate of Tangier. It is of the narrow-crowned variety, like the tooth from Gibraltar, 
which was also found in a marine deposit. 
