THE TRANSITION SERIES. ' 55 



The surfaces moreover, though frequently well exposed in large flat 

 sheets, are never, as far as my observations go, ripple marked, whereas the 

 presence of ripple marks is extremely common in the hard quartzites of 

 the Cuddapah series. This quartz-rock' is seen alternating in beds of 

 very various thickness, with the hornblendic and micaceous schists. The 

 bands are sometimes only an inch or two in thickness, and very numer- 

 ous within short spaces, but frequently they are of very much greater 

 thickness, and form ridges of no inconsiderable size. 



"These bands of quartz-rock with a similar character occur also 

 abundantly south of the Penner, and there also form ridges as here but 

 they appear to increase in frequency north of the river, and spread out 

 northwards in a fan-like manner, with their alternating schistose bands 

 from about £0 miles south of the Penner to the northern edge of the 

 sheet. The general strike of, the beds is about north -north- west, vary- 

 ing, however, considerably, trending more to north-west in the westerly 

 parts of this quarter-sheet, and approaching more nearly to a north- 

 south strike in the eastern parts. The quartzose bands are somewhat 

 less numerous in the western portions, which consist more largely of 

 micaceous and talcose schists, with some hornblendic and quartzo-horn- 

 blendic bands, and a few narrow bands of quartzo-micaceous and 

 quartzo-felspathic gneiss. 



" Talcose bands occur also apparently continuous with some of these 

 south of the Penner, where I noticed them in the neighbourhood of 

 Navoor, Yatoor, and north-west of Saidapuram, where near Jogipali, 

 a highly talcose gneiss or talc -rock is quarried to a small extent and 

 worked into small pots, figures, &c. 



" In many bands, chiefly of hornblendic and quartzo-hornblendie 

 schists, garnets are largely abundant, specially so in a series of horn- 

 blendic schists extending in a north-north-west direction by Jummaw- 

 drum, Kotapela near Kanigiri, Woopaloor, &c. A similar (probably the 

 same) band of rocks continues south of the river near Ayergarpilly, 

 Lingumpully, Thooroomulla, and near the last-named place we procured 

 many excellent crystals, very perfect and of various sizes, from more than 



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