MUSEUM OF COMPARATIVE ZOOLOGY. 109 
trap in sandstone at contact ; two thin tufa beds a few feet above trap 
sheet. See special account. 
Locality 9. Anterior to Cat Hole Peaks. Percival’s Report, pp. 375, 376. 
Two small openings in the anterior ridge east of the Meriden poor- 
house, a mile and a half northwest of the city (Fig. 6), expose the lower 
part of the sheet. It is generally of dense structure, but presents ex- 
tremely irregular forms, as if consisting of ropy masses of flowing lava ; 
the spaces between these masses are filled with a much weathered 
loose material that may perhaps be lapilli; there are numerous “ spike ” 
‘amygdules (see special account of locality 13) near and at right angles 
to the convex surfaces of the lava masses. The upper portion of the 
same sheet, where seen on roads on the back of the ridge, locality 9’, is 
highly vesicular. 
Locality 10. Anterior of Notch Mountain. Percival’s Report, pp. 875, 876. Perci- 
val’s notation, Ant. to E. IV. 1 (3). 
A hundred feet southwest of the Meriden poorhouse, the sandstone 
appears a little above the trap of the anterior sheet to Notch Mountain 
(Fig. 6); a small piece of vesicular trap was found init. The same 
anterior sheet, where exposed in the Reservoir Notch, a third of a mile 
to the west, is extremely vesicular in its upper part. 
Locality 11. Anterior to Shuttle Meadow Mountain.! Percival’s Report, 
pp. 375, 376. Percival’s notation, Ant. to E. IV. 1 (4). 
A few poor exposures in the road on the back of this anterior, half a 
mile south of Shuttle Meadow Reservoir, reveal weathered fragments 
of vesicular trap in the sandstone overlying the sheet. Some of the 
vesicles in these fragments contain clastic deposits. 
Locality 12. Anterior to Farmington Mountain. Percival’s Report, pp. 875. Per- 
cival’s notation, Ant. to E. IV. 1 (9). 
An excellent exposure of this anterior is found about a mile east 
of Farmington, directly north of Stetson’s house (Fig. 7). Middle of 
sheet dense; bottom sparingly cavernous; upper portion generally 
sub-amygdaloidail to cavernous ; very vesicular at upper surface, where 
numerous vesicles are filled with indurated bitumen ;? surface of sheet 
very uneven, with sandstone conformably filling hollows and open vesi- 
cles; intimate mixture of trap fragments and sand grains on upper 
surface. 
* Called “North High Rock” in Bull. Mus. Comp, Zodl., 1889, No. 4, Fig. 13. 
2 Percival, Geol. Conn., 1842, p. 375. 
