Please add punctuation to this: We should also remember that many freshwater productions are low in the scale of nature and we have reason to believe that low beings change or become modified less quickly than the high and this will give a longer time than the average for the migration of the same aquatic species
We should also remember that many fresh-water productions are low in the scale of nature, and we have reason to believe that low beings change or become modified less quickly than the high; and this will give a longer time than the average for the migration of the same aquatic species.