1832  Five kinds . . . come down to the coasts of Labrador, Newfoundland, and to the Gulf of St. Lawrence: the harp seal (phoca Groenlandica), the hooded seal (phoca leonina) . . . the square flipper, the blue seal, and the jar seal.
1861  The "Jar" is a seal of social habits, like the beaver, living in large communities under the ice in winter, and in numerous bays along the coast in summer.
1959  Although they had the opportunity of fishing for Arctic char, they spent much of their time hunting for jar and bearded seals.