D. K.D.ViDKNSK. Sklsk.Ski<..n.vtiuv.oc, math. Al- 1). VIII. 4 ITh.Thohmu.s.sonI 



Plate XII 



A large isolated mud volcano at Hengill. The culuiiiu of white mist in the background indicates 

 a group of hot springs to the south-east of the mud volcano. 



