299 
March 3, 1873. 
The Vicr-PRESIDENT (PROFESSOR ADAMS) in the Chair. 
Notes on the Hippopotamus. By Mr J. W. Crarx. 
Mr J. W. Clark exhibited the mounted skeleton, and some 
portions of the visceral anatomy (preserved in spirit) of the 
young female hippopotamus, which was born in the Gardens of 
the London Zoological Society, on January 7, 1872, and died on 
the following Wednesday. The remarks he made in illustration 
of the specimen were in substance a réswmé of the paper read 
by him before the Zoological Society on Feb. 20, 1872, and 
printed in their Proceedings. 
On the Foraminifera and Sponges of the Cambridge 
Upper Green Sand. By Mr W. J. Souuas. 
After a description of the Green Sand, and an enumeration 
of its characteristic foraminifera, the author discussed the origin 
of its abundant green grains, and indicated that to a large 
extent these bodies consist of the casts of foraminifera. The 
included coprolites of the formation were next investigated. 
Their marked connection with previously existing organic 
matter was noticed, and it was shewn that this connection 
characterised the coprolites of various other deposits. Hence 
was derived a definition for the word “coprolite:” coprolites 
being defined as “those bodies which have been produced by 
the phosphatic fossilisation of organic matter, or of the imme- 
diate products of its decomposition.” The nature of the organ- 
isms which furnished this organic matter was shewn, in the 
case of nodules of hitherto obscure origin, to be spongeous. 
The sponge-like form of these nodules, the characters and 
arrangement of their well-marked oscules, and the forms and 
