14 THE CANADIAN NATURALIST. [Feb. 



Large prizes were to be given for quantities of the nettle fibres 

 to be delivered at Lahore in October 1863. The fibre brinsfs 

 from £16 to £18 sterling per ton in London. 



26. Diatoms of the South Pacific. — Dr. Greville has de- 

 scribed, with exquisite figures, (Trans. Bot. Soc. Ed.,) numerous 

 new species of diatoms obtained from dredgings in the South 

 Pacific. There are two new genera, viz. : Stictodesmis, Grev., and 

 OmphaIoj>sis, Grev., and thirty-one new species. 



Halifax, N. S. Jan. 7, 1864. 



( To be Cordinued.) 



CAVE IN LIMESTONE NEAR MONTREAL. 



By H. G. Vennor. 



Under a similar heading to the above, this cave is noticed in the 

 Canadian Naturalist and Geologist, Vol. Ill, page 192. To that 

 article we would refer those interested, for the exact position of 

 this cave. The party or parties, who then visited this curiosity — 

 if I may so call it — found it filled with several feet of water, and 

 were unable to give it any satisfactory examination. On the 11th 

 of November last I visited the cave, and had no difficulty 

 whatever in finding it. Of late years, the entrance has been 

 considerably enlarged. Formerly, the opening was situated be- 

 tween the roots of a tree, which is yet standing in the vicinity ; but 

 some time since, the earth was slightly cut away, exposing the 

 surface of the rock, and greatly enlarging the means of access to this 

 cavern. From the outside, the limestone has a very rusty and 

 weather-worn appearance, and is of a shaly texture. The whole 

 surface is filled with the fossil shells and corals peculiar to the 

 Trenton limestone. The mouth of the caves is about four feet high, 

 by six feet in width. On entering, I was agreeably surprised to find 

 that the water had entirely subsided into a narrow well, or fissure 

 in the floor, some twenty feet distant from the mouth of the cave. 

 Standing by this well, the room was about thirteen feet high by 

 eight feet in width. The walls jutted out irregularly on either 

 side, but gave the average width of eight feet. The ceiling was 

 also of limestone rock, and coated over with stalactitic car- 

 bonate of lime, from which hung a few small stalactites. In the 



