636 NOTES 0~N THE GEOLOGY OF THE TROAD. 



the allavial deposits and changes in the river-course of the plain of 

 Troy, &c. ; Frank Calvert * the supposed changes of the coast-line. 



The modern course of the Mendere (Scainander) is on the western 

 side of the plain of Troy, hut its ancient bed can still be traced on the 

 eastern side, under the walls of Hissarlik. A similar change is more 

 plainly proved in the Halesian Plain, near the mouth of the Touzla 

 river (the ancient Satnioeis), where a Roman bridge, which once 

 spanned the river, is now 250 yards from it, the old channel having 

 been completely silted up f . 



Discussion. 



Mr. Warington Smyth remarked on the difficulties he encountered 

 when he travelled in the Troad many years ago. He confirmed the 

 author's views on the general structure of the district, and remarked 

 on the analogies of the volcanic rocks with those of Hungary and the 

 Rhodope to the north and the Katakekaumene to the south. 



Admiral Spratt was also able to confirm the great accuracy of 

 the map, and especially of the divisions of the marine and fresh- 

 water Tertiaries. At one point he found the freshwater and marine 

 beds interlacing with each other. He suggested that one of the 

 springs at Bounar-bashi, which he regarded as giving rise to the 

 Seaman der, and described by Homer as hot, might have been so in 

 his day, as it issues from a crevice between the limestone and a 

 trap or trachyte dyke. 



Mr. Topley stated that the classical names placed on the map 

 were inserted by himself and not on the authority of the author. 



* " Asiatische Kiistenlinie des Hellespont," Zeitschr. fiir Ethnologie (Berlin), 

 1880. 



t Another instance of a like nature occurs on the Riviera east of Albeuga, 

 where the roadway of a Roman bridge (Ponte Lungo) is now only seven or eight 

 feet above the Alluvium ; the river is now west of the old bridge. 



