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The Naturalist. 



most unstable, and deepest seated of igneous products, and the last to be 

 ejected during a prolonged volcanic outpour. At times these bring up 

 with them grains of unoxidised iron, showing Michenstatt lines similar to 

 those exhibited by meteoric iron wlien etched out with acid. In some 

 instances, more particularly those of Ovifak, Greenland, these volcanic 

 products have been mistaken for meteoric matter supposed to have fallen 

 at the moment of eruption, and there are reasons for suspecting a like 

 confusion in other examples from Hungary, the Urals, Mexico, and else- 

 where. The inference that may be fairly drawn from these investigations 

 is that the extra-terrestrial bodies scattered like dust through cosmic 

 space are built up of the same materials as constitute the interior of our 

 globe. At the close of the lecture Mr. Tate exhibited specimens of 

 meteorites, &c., and also some beautifully prepared microscopic sections 

 of various minerals, in illustration of his remarks. 



The Leeds Natuealists' Club and Scientific Association. —373rd 

 meeting, Mar. 23rd, Mr. W. B, Turner, F.C.S-, vice-president, in the i 

 chair. — Mr. B. Saynor exhibited the pork-entozoon {Trichina spiralis), the 

 life history of which was detailed by him and Mr. Abbott. Mr. Washington 

 Teasdale, F.R.M.S., showed diatomaceie from Santa Monica, containing 

 some hitherto unknown forms. The chairman, a gathering of fresh-water 

 algee from Sutton Park, Birmingham, sent by Mr. A. W. Wills, which 

 included Desaridium, Byalotheca, Coleochoete, Tabellaria, Melosira, and i 

 the curious and rare Asterionella formosa. Mr. F. Emsley drew attention 

 to the leaf-glands of Drosera rotnndifoUa and D. longifolia. Mr. E, 

 Thompson, a form of apertometer, for measuiing approximately the 

 angular aperture of object glasses. In botany, Mr. J. R. Murdoch 

 showed a long series of the genus Trifolium ; Mr. C. Smethurst, a black 

 variety of Fhigalia pilosaria, from Meanwood. 



374th Meeting, Mar. 30th, Mr. Henry Lupton, vice-president, in the | 

 chair. — Two very destructive beetles were shown — Phratora mdgatissima, | 

 which defoliates willows by the acre at Knottingley ; and Otiorhynchus j 

 sulcatus, very injurious to vines in Huddersfield greenhouses. Mr. C. 

 Smethurst showed the lepidoptera he had taken at the Masham excur- | 

 sion, including Anisopteryx cescidaria, &c. Mr. W. H. Taylor opened a j 

 discussion as to the systematic position of the clear-wings " of the 

 family ^geriidse. The progress of the list of insects which are found on , 

 the magnesian limestone about Bramham, &c. , was reported, the lepidop- 

 tera counting up to 453 species, and the beetles to about 35. It was 

 mentioned, on the authority of Mr. John Smith of Bramham, that 

 Zygoina fili'pendulm is not extinct in his district, as was reported. Mr. 

 Smith in the same letter stated that last autumn he saw Vanessa Antiopa, 

 but did not capture it. Mr. J. R. Murdoch showed living specimens of 

 marine animals from Scarborough, including Pagurus Bemhardits 

 (hermit crab). Echinus niiliaris and E. esculentus (sea-urchins), Uraster 

 ruhens (star-fish), besides various sea anemones and marine algae. Mr. 



