Where both parents are clawless the progeny also are usually unclawed, indicating that the genetic factors concerned are either wholly lost to the germ plasm or too weak to express themselves in the soma.

areal interstices — the areas or spaces inclosed by the reticulate vessels of leaves

Fifty thousand men cannot easily steal a march over the sea.

Which has its pluses and minuses—it's really hard to write device drivers for bare metal in a completely type-safe language just because the levels of abstraction are wrong for talking to the bare metal.