486 



and Mount Liimu (663 m.) rising on the west-side of the mentioned 

 bay over Sosi are extinct volcanoes. 



The expedition of 1890 had communicated regarding Central 

 Flores that in the province of Toa, in the river-basin of the Nanga 

 Koli, they had marched exclusively through a volcanic territory. In 

 the upper-river-basin of this river, in the neighbourhood of Soa 

 (about 8°40' S., 121°2' E.) — one of the repeatedly mentioned 

 finding-places of tin-ore — Pannekokk found at a height of ± 400 m. 

 a territory of horizontally stratified marls with interjacent light-yellow 

 tufas containing impressions of leaves, molluscs, insects and fishes. 

 He supposed these strata to be sediments, deposited in a fresh-watei- 

 basin and called it Soa formation '). More eastward, between Mautenda 

 and Dondo on the North-coast another territory is situated which, 

 according to Pannekoek's map, is covered by sediments of the Reo 

 formation. 



The southern half of Central Flores, on the contrary, contains most 

 of the still active volcanoes of this island. To the East of the Aiméré 

 Bay rises in the first place Inije Rije (Inië Rië) 2494 m. high, more 

 known by the name of Gunung Rokka, which is in a solfataric 

 activity. Wiluam Bugh saw it smoking for the first time on the 

 22"'i of August') and Pannekoek perceived on his visit in 1910 

 that the solfataras are situated on the east-side of the crater bottom '). 

 The long ridge of the Langga Mountains seems to be, according to 

 Pannekoek, a Somma-edge' of Mount Rokka. To the East of this 

 mountain rises Watu Sipi 1466 m. and another mountain 1533 m, 

 the name of which is unknown. Both are extinct volcanoes. In 

 the North-east of the Rokka a group of volcanoes is found that are 

 no longer iictive among others Kopo Lebo, Wolo Mere, about 2000 m. 

 high, Pipodok, Wolo Lega, Lebi Saga, which were discovered during 

 the military expedition of 1890 '). 



Inije Lika (Inië Like) 1600 m. high, hitherto entirely unknown, was 

 discovered in 1910 in North Ngada and described by G. P. Roüffaer'). 



1) Eenige geologisclie gegevens omtrent het eiland Flores. Jaarboek van het 

 Mijnwezen 39. 1910. Batavia 1912. Verhdl, p. 135. — Overzicht van de geogra- 

 phische en geologische gegevens.... van liet eiland Flores. Ibid. 40. 1911. Batavia 

 1913, p. 220-221. 



-) A Voyage to the South Sea undertaken by Command of His Majesty. London 

 1792, p. 246. Dr. R. D. M. Verbeek kindly informs me that this is a mistake. 

 Instead of Mount Rokka has to be put Mount Keo. 



'■'') Eenige geologische gegevens, as quoted p. 135—136. 



■*) P. G. ScHMiDHAMER a? quoted p. 389, 390. 393 and map. 



°) De inije Lika op de hoogvlakte van Ngada. Tijdschr. K. Ned. Aardr. Gen. (2) 

 27. 1910, p. 1233—1239, vide l.kewise J. J. Pannekoek van Rheden, Overzicht van 

 de geographische en geologische gegevens. 1. c, p. 219, 223. 



