Essay, @c.. 169 
Tagal, the Sundoro and the Sumbing, is not con- 
siderable: these their principal volcanic points 
could here be taken into view at once. | 
On the track from Purwo-rejo to Gomuro, 
the numerous terminations of the descending 
ridges alternate with leved districts: they are 
all covered with a deep reddish soil or with 
vegetable mould: on proceeding to the east- 
ward, the declivities which form the valley of 
the Serayu come nearer to each other. Between 
Gomuru and Kutro-waringin, I crossed this 
river about a mile below the entrance of the 
river Merawu, which descends with a rapid 
stream, in order to examine the principal of the 
northern eminences of the central ranges. At 
this point an extensive stratum of Pudding- 
stone is exposed at the banks, which is either 
compact, like that of Karang-bollong, or loose 
and friable, like the Tufa of Suko-rojo. 
Several of the separate fragments which I de- 
tached with some difficulty, resemble greatly 
the common Hornblende of Werner, although 
they must be classed with our Basaltes. This 
as well as the two specimens of aggregate rock 
*are decscribed in the explanatory Catalogue. 
Of the rounded pebbles collected in the bed 
of the Serayu, the most remarkable were a com- 
pact Pudding-stone, apparently brought by the 
current from a distant situation, and a peculiar - 
stone ( of the Floetz-trap formation of Werne ) 
resembling Wacke, of an obscure blueish grey 
breadth from that of a hair to half an inch; 
Their direction is curved or undulating, and 
- * Exp. Cat. No. 45. 
