A collection of four Chinese Yixing teapots and covers

A collection of four Chinese Yixing teapots and covers
18th/19th Century
Comprising a hexagonal teapot and cover moulded with dragons chasing the flaming pearl; a square teapot and cover with buddhistic lion final with moving brocade ball; and two various globular teapots and covers, both marked on the bases
5.5-14.5 cm. high (4)