Dipterocarpus, a genus of the Dipterocarpaceae, a family of dicotyledonous plants restricted to the tropics of the Old World.) could have been developed since the Glacial era; but do you feel so sure, as to oppose (359/4.
The meaning seems to be: "Do you feel so sure that you can bring in opposition a large body of considerations to show, etc.") a large body of considerations on the other side, that this genus could not have been slowly accustomed to a cooler climate?
I see Lindley says it has not been brought to England, and so could not have been tried in the greenhouse.

Have you materials to show to what little height it ever ascends the mountains of Java or Sumatra?
It makes a mighty difference, the whole area being cooled; and the area perhaps not being in all respects, such as dampness, etc., etc., fitted for such temperate plants as could get in.

But, anyhow, I am ready to swear again that Dipterocarpus and any other genus you like to name did survive during a cooler period.
About reversion you express just what I mean.

I somehow blundered, and mentally took literally that the child inherited from his grandfather.
This view of latency collates a lot of facts--secondary sexual characters in each individual; tendency of latent character to appear temporarily in youth; effect of crossing in educing talent, character, etc.

When one thinks of a latent character being handed down, hidden for a thousand or ten thousand generations, and then suddenly appearing, one is quite bewildered at the host of characters written in invisible ink on the germ.