2611. Where different species of property are insured under a single valuation, the valuation is apportioned over the different species in proportion to their respective insurable values; similarly, the insured value of any part of a species is such proportion of the total insured value of that species as the insurable value of the part bears to the insurable value of the whole.
Where the valuation of the insured value of different species of goods has to be apportioned, and particulars of the invoice value, quality, or description of each separate species cannot be ascertained, the division of the valuation may be made over the net arrived sound values of the goods.