226 NILGHIRI HILLS. 



scarce, so that in the Shevaro3's, and probably 

 NoneintheShevaroys. ^j^^ -^^ ^^^ ^^j^^^ j^-|^ ^^^^^^ around Salem, no 



trace of them is visible. In this respect, therefore, these hills resemble 



the Neelgherries. 



Trap. A large portion of the homblendic rocks described in the 



preceding section have been noted as Greenstone, 



BCl?b°e'd^a^'^Tra'^^■'Llly Syenite, &c., by Dr. De Benza and other observers, 



"°^'^^' but careful observations have proved that such 



are but part and parcel of the great foliated mass, and in no case intruded. 



The only rocks which can be really regarded as 



Trap dykes small and ^^.^^ rocks are a few small dykes marked as such 

 rare. '■ "" 



in the accompanying map (Plate X.) These, 



although exceedingly small, had previously been observed by Dr. De Benza 



and Dr. Burrell, and afford sufiBcient proof of the 



Have been previously careful and minute observation exercised by both 



observed. 



these observers. The dyke marked as passing 

 through Daversolabetta was only seen in two localities, viz., on the Nor- 

 thern slope of that hill, about 200 yards from the 



Trap at Daversola- ^ 



betta. summit, and again to the North West in the bed 



of a small watercourse on the western side of the valley, and in both 



cases consists of several small parallel dykes, varying from two to ten 



inches in width, and consisting of a tough compact basaltic rock. That 



occurring to the North of the Pykara road is 

 Near Pykara Road. 



very similar to the above. It is only visible for a 



short distance, and no trace of it was found elsewhere in the hills. The 



direction of these dykes is about N. W. or neai-ly 



at right angles to the foliation of the gneiss. 



The only other locality at which Trap has been observed is the 



neighbourhood of Sispara at the South Western 



Described by Mr. King, extremity of the hills. Mr. King, who examined 



this part of the hills, describes the trap as follows : — ■" Between the Sis- 



