Lat. In the clvll and old English law. The washing up of the sea; formation of soil or land from the sea; maritlme lncrease. Hale, Anal. $ 8. "Alluvia maris is an increase of the land ad-joining, by the projection of the sea, casting up and adding sand nnd slubb to the land, whereby it is lncreased, and for the most part by insensible degrees.” Hale, de Jure Mar. pt. 1, c. 6