Upper 

 Gallery. 



Wall-cases 

 6 and 7. 





256 



EXTINCT VOLCANOS. 



286. — Trap rock, crystals of analcime in a liornblendic 

 base. — Longeiul, near Montreal, Lower Canada. 



287. — Trap rock, composed of crystals of augite and 

 analcime in a hornblende base. — Montreal Mountain, Lower 

 Canada. 



288 . L ABR ADORITE 



Lower Canada. 



Part of a Boulder. — Montreal, 



289. — Serpentinous rock, with small octahedral crystals 

 of chr ornate of iron on a weathered surface. — Brompton 

 Pond, Canada West. 



Slaty tourmaline, Levant Mine, St. Just 



290. 



Cornwall. 



291. — Mica rock, principally composed of lamina) of 

 black mica. Part of a boulder. — Near Montreal, Lower 

 Canada. 



292. — Breccia, composed of fragments of quartz grit, 

 cemented with black chert. Part of a boulder. — Near Mon- 

 treal, Lower Canada. 



293. ACTYNOLITE. 



294. — Basaltic dyke, cutting through slates, and con- 

 taining crystals of hornblende, black mica, and kernels of 

 calc spar. — Toulinquet, north coast of Newfoundland. Pre- 



sented by J. B. Jukes, F.R.S. 



tfiC 



t' 





M 





p 



(si 



bi 



l 



t!i 



i 



! 



miles fi 



i-' 



Table-case in Recess 



Collection of Lavas, Ashes, Simple Minerals, fyc, from the 

 district of the Extinct Volcanos of the Papal States. 



Arranged and Described by H. W. JBristow. 



The date of the extinct volcanos of the Roman States has 

 been satisfactorily determined by the researches of Sir 

 Roderick Murchison and Sir Charles Lyell, by both of 

 whom it has been referred to the Coralline Crag period of 

 the older Pliocene. The earlier volcanic rocks of this dis- 



.Ullnr 



Li 



10. 



14 



* 



