referring to species

Hi,

In Isaiah 65:25, it is in part written like this:

The wolf and the lamb will feed together, and the lion will eat straw like the ox, but dust will be the serpent's food.

I think the underlined names are referring to their species, not the classes?? of those animals.

OK, but as some of you know (as I see it), this way of putting a 'the' in front of nouns is not limited to the names of animals but seem to extend to some other nouns like the name of a profession (eg, carpenter).

Is this, which is being asserted by a person, being used generically?

The scientist is generally better in math than the potter.

I think the above sentence can be written differently like these:

Scientists are generally better in math than potters.

or

A scientist is generally better in math than a potter.

All seem to be good as a general referental sentence.