hills (an ordinary tanety), Mr. Baron writes : We 

 saw several small crater-like depressions ; but there 

 were two which beyond all doubt were ancient volcanic 

 orifices. They were only separated by the space of 30 

 or 40 yards of ground which formed the backbone of 

 the hill. They were extremely similar in appearance, 

 both having the breach in the rim facing north or 

 north west. They were very small, the sheet of water 

 in them being only 20 or 30 yards in diameter ; but 

 from their close proximity and twin-like similarity 



formed striking objects This hill, the inclination 



of which averaged from about 15 to 20 degrees, was 

 formed (the outer coating at least) of volcanic scorioe 

 and lapilli, many of which were lying loose on the sur- 

 face. The characteristic cellular structure of these vol- 

 canic products was plainly visible— leaving here Mr, 

 Baron continuing to write, we went to a valley to the 

 north, on the western margin of which was a whitish or 

 greyish white kind of stone^merely a local deposit— 

 which the natives call vatofangala, and which they use 

 as fireflints. This stone was a hard compact kind of 

 siliceous sinter (frequently found in volcanic districts) 

 in which were invested numerous fossils of the stems of 

 a plant from I in. to nearly a ^ in. in diameter, striated 

 longitudinally, and jointed at intervals. The plant 

 was undoubtedly an equisetum, having its fistular stem 

 filled in with the siliceous deposit. The stone was 

 very full of those fossils and, doubtless, others of a 

 different kind would be found by proper rexamination 



