An Yixing Stoneware Teapot and Cover (with mark)

the body modelled in the form of multiple vertical stems of bamboo, set to one side with a similarly modeled dragon spout and to the other with a dragon loop handle, the flat cover with a dragon-head finial. A few bats are modeled on the cover. A four-character mark at the bottom. 

D: 6 3/4 in.

See images for more details.