292 
.Numerous remains of this species are found in the Norwich 
crag and also in the forest-bed. 
Arvicola agrestis (Fleming). — The teeth of Arvicola agrestis 
may be easily recognised from those of A. amphibius, by the fact 
that the second molar in A. agrestis has five cemental spaces instead 
of four, as in A. amphibius. The third upper molar shews a minute 
supplementary angle on the outside. 
The species is found, together with A. amphibius , in the Norwich 
crag and forest-bed. 
Order INSECTIYOEA. 
Genus PALJEOSPALAX. 
P. magnus (Owen). — Professor Owen, from a lower jaw of an 
insectivorous mammal, found in the forest-bed, has founded the 
genus Palseospalax. This animal was a water-mole, and exceeded 
the common mole in size as much as Trogontherium did the 
European beaver. It differs from the common mole, not only in 
its larger size, but also in the fact that there is between the two 
principal cusps of each molar tooth a small tubercle, of which 
there is no trace in recent insectivora. 
Two specimens of lower jaws have been found in the forest-bed. 
One is in the British Museum, and the other in the collection of 
Mr. Savin, of Cromer. 
"VIII. 
MEMOIR OF THE LATE REV. RICHARD LUBBOCK. 
By Henry Stevenson, F.L.S. 
Read 27 tli Feb., 1877. 
Many authors have acquired an established reputation not merely 
by the excellence but by the multiplicity of their published 
works, whilst others have attained a not less imperishable fame by 
one effort of genius — a single contribution to some particular class 
of literature, with which, for all time, they are personally identified ; 
and in this sense it would bo as impossible to disconnect the name 
