8 GEOI.OOY OK TlilCIIIXOPOI.Y, &C. [ClIAP. T. 



occurring 1>et\veen the Colevoon and ^'ellaul•, and between the latter 

 river and the Guddelom, and again on the nortli side of the Ariankii}) 

 river. 



Ahout 10 miles to the west of Tanjore^ the metamorpliic rocks 

 are again met with, and form the surface of the country up to the 

 western boundary of om* area. Here the character of the country 

 generally is slightly undulating, with long low ridges, which extend 

 in a north-east direction, and die away into the general plain as they 

 approach the alluvial valley of the Cauvery. Only a few isolated hills 

 of no great height occur in the metamorphic region southi of the Cau- 

 very, the chief of which are the Trichinopoly rock, the Punganur hill, 

 the Uetnagherry hill, and the Togamullay. The country is generally 

 open and cultivated, but here and there jungly tracts of some extent occur. 



The alluvial valley of the Cauvery westward of Seringham Island, 



which forms the head of the delta, offers no 

 Cauvery valley above 



delta. very special featvu^es of note. Its width dimi- 



nishes gradually from about 3| miles at the opening into the delta 

 to If miles at the village of Shavindipolliam, where the Cauvery passes 

 beyond tbe limits of our area. Like the delta, this alluvial valley is in 

 a very high state of cultivation. 



The country between the Cauveiy and the mountains sliows a 



, ^ ,, very rough and barren belt of rocky ground 



Country north of tbe -^ *= -^ *= 



Cauvery. running parallel with the Cauvery as far west 



as Moganoor, and about 4 or 5 miles in width. The country north 

 of this rough zone becomes a tolerably level plain, broken only by a 

 few isolated hills, e. g., the Puggalawaddy pagoda hill and the TuUa- 

 mullay, with a number of small subsidiary ridges. Proceeding west- 

 ward and north-westward, the ground rises very gradually from an eleva- 

 tion of 236 feet at Trichinopoly to 511 at Namcul. Near the latter 

 place the face of the country is scattered over with numerous rocky hills 

 of various sizes, the chief of which are the Kannavoj'poodoor hill, 

 the Sunashamullay, and the Namcul-Droog hill. The country seems 

 ( :^-30 ) 



