Once income has been verified, use the following to determine qualifying quarters: If the year is: Credit 1 quarter for at least this amount. Credit 2 quarters for at least this amount. Credit 3 quarters for at least this amount. Credit 4 quarters for at least this amount.
Making the world better, one answer at a time. Periwinkles reproduce annually with internal fertilization of egg capsules that are then shed directly into the sea. The female periwinkle lay 10,000 to 100,000 eggs. Periwinkles reproduce annually with internal fertilization of egg capsules that are then shed directly into the sea. The female periwinkle lay 10,000 to 100,000 eggs.
From Wikipedia, the free encyclopedia. For the shrub with the same vernacular name, see Vinca minor. The common periwinkle or winkle (Littorina littorea) is a species of small edible sea snail, a marine gastropod mollusc that has gills and an operculum, and is classified within the family Littorinidae, the periwinkles.This is a robust intertidal species with a dark and sometimes banded shell.ommon periwinkles have been introduced to the Atlantic coast of North America, possibly by rock ballast in the mid-19th century. The first recorded case was in 1840 in the Gulf of St. Lawrence.