ANDESITES OP DEVONSHIRE. 501 



were seen under the microscope to be chiefly angular quartz/ In 

 order to make quite certain, a fragment of No. 929 d was roughly 

 powdered, dissolved (with strong effervescence) in HCl, and the 

 specific gravity of the isolated grains was determined. It agreed 

 with that of quartz. 



YI. List of Localities examined. 



As many of the quarries in which the ' traps ' are exposed are no 

 longer worked, are much overgrown, and tend to become obliterated, 

 I give a list of those examined by me, with exact indication of their 

 position, premising that the numbers preceding each locality are 

 firstly a number for reference in the subsequent petrographical 

 description, and secondly, the number of the quarter-sheet of the 

 6-inch Ordnance Survey maps (pub. 1887-90) on which they are 

 indicated. 



No. 889 (34 S.W.). Washfield, 2^ mHes N. 35° W. of Tiverton. 

 Quarry in Mousebeare Lane, 383 yards west of church. 



No. 891 (34 S.W.). Exposure in roadside, Long Lane, 1325 yards 

 S. 28° E. of Loxbear Church, N.W. of Tiverton, and 392 yards west 

 of lane turning down to Lurley. 



Nos. 895 a, 895 b, 896, 897, 898 (56 S.W.). Eaddon Quarry, 

 1733 yards S. 84° W. of St. Thomas a Becket's Church, Thorverton, 

 6 miles north of Exeter. 



Nos. 899 A, B, c, & D (68 N.E.). Quarry in Quarry Lane, Lower 

 Budlake, 6 miles N. 37° E. of Exeter, 667 yards east of Killerton 

 (house). 



No. 900 (68 N.E.). Killerton Park, 5| miles N. 33° E. of Exeter. 

 ' Old Quarry ' on east side of park, 705 yards N. 25° E. of Killer- 

 ton (house). 



No. 901 (68 N.E.). Old quarry at ' Remains of Camp,' Dolbury, 

 Killerton Park. 



No. 902 (68 N.E.). Old quarry, 127 yards S. 61° W. of northern 

 lodge, Killerton Park. 



No. 903 (68 N.E.). Quarry at Dunsmoor (Densmoor), 1302 yards 

 south of St. Mary's Church, Silverton(Silvertonis 6f miles N. 17° E. 

 of Exeter). 



No. 904 (68 N.E.). Quarry (Eew Quarry ?), on road from Silver- 

 ton southward to Eew, 600 yards N. 81° W. of Heazille Barton. 



Nos. 906, 906 a (68 N.E.). Quarry in Columbjohn Wood, 1008 

 yards N. 83° W. of KiUerton. 



No. 907 (68 N.E.). Moss-grown quarry, 195 yards N. 83° W. of 

 Killerton. 



No. 908 A (68 N.E.). Old quarry at Beare Earm, 1575 yards N. 

 58° E. of Killerton. 



No. 909 (56 S.E.). Old quarry (now a pond) in the grounds of 

 Silverton Park (Combe Sacheville), 195 yards west of house. 



1 The appearance of the section is quite like pi. xi. of E. D. Irving's mono- 

 graph, ' The Copper-bearing Rocks of Lake Superior.' 



