Zoology. 281 
of molluskite, no ova had ever been detected ; while in the shales of 
Forfarshire, which swarm with these eggs, neither shells, nor even casts 
of shells, had been discovered. An important geological inference 
was supported by Dr. Mantell as deducible by these facts. Here we 
III. Zootoey. 
a The ‘Relations of Embryology and Spermatology to some of the 
rats Gr Peet Ge e; i Dr. W. I. Bur- 
the microscopical study of developing forms, or, in a word, to orga 
atoms, Tiare been sa to doe the opinion that, beyond and 1s0- 
lated from matter, there exist not only what is termed a vital force, but 
ideas and t ren ea : wie nee ca ead shia exeriek doubly iS oie: 
Szcoxp Series, Vol. XIII, No. 38—March, 1852. 36 
