WEN 



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WIN 



Euomphalus discors, Euomphalus 

 funatus, and Euomphalus rugosus; 

 Productus euglyphus and Productus 

 depressus; Atrypa aspera and 

 Atrypa tenuistriata ; Terebratula 

 imbricata and Terebratula cuneata ; 

 Nerita, Haliotis, &c. Orthocerata 

 are also found. Trilobites are most 

 abundant, the prevailing species 

 being Asaphus caudatus and Caly- 

 mene Blumenbachii. Some other 

 species of trilobites appear to be 

 peculiar to the Wenlock formation, 

 as the Calymene variolaris, Caly- 

 mene macrophthalma ; Asaphus 

 Stokesii, and the genus Acidaspis, 

 so named by Sir R. Murchison. 



WENLOCK SLATE. Called also Wen- 

 lock shale. An argillaceous, dark- 

 grey or liver-coloured shale, con- 

 stituting the lower member of the 

 Wenlock formation, and containing 

 nodules of sandstone. The Wen- 

 lock shale, or lower member of the 

 Wenlock formation, is characterized 

 by certain species of shells, the 

 most abundant of which are Pro- 

 ductus transversalis ; Spirifer car- 

 diospermiformis ; and Spirifer tra- 

 pezoidalis ; Terebratula breviostra, 

 Terebratula imbricata, and Tere- 

 bratula interplicata ; Asaphus lon- 

 gicaudatus ; and Orthoceras atten- 

 uatum." Sir R. Murchison. 



WE'BNE.RITE. A rare mineral of a 

 greenish grey, olive green, or, 

 sometimes, white colour, occurring 

 in eight- sided prisms, terminated 

 by four-sided summits, whose faces 

 form with the alternate lateral 

 plates, on which they stand, an 

 angle of about 121. It is found 

 at Arendal in Norway, and in 

 Sweden and in Switzerland, and 

 named after Werner. It consists 

 of silex 45-5, alumine 33-5, lime 

 13-22, oxide of iron 5'75, oxide of 

 manganese V47. 



WHEEL-SHAPED. In botany, a term 

 applied to a corolla of a salver- 

 shaped form, having scarcely any 

 tube. 



WETHEEE'LLIA. The name given 

 by Mr. Bowerbank to a genus of 

 fossil fruits found in the London 

 clay. He says " it is perhaps the 

 most abundant of all the fruit 

 found in the Isle of Sheppey, and 

 is well known throughout the 

 island by the name of Coffee, to 

 which some of the sections of the 

 fruit, when separated from each 

 other, bear a very strong resem- 

 blance." 



WHET SLATE. | The Novaculit 



WHET- STONE SLATE, j of Kir wan. 

 Por a description, see Hone. 



WHI'NSTONE. A provincial term ap- 

 plied to some of the trap rocks. 

 In the western parts of Sussex, 

 says Dr. Mantell, layers of chert 

 or hornstone, provincially termed 

 whinstone prevail in the sand near 

 Petworth, &c. This stone is a 

 compact mass of quartz, but not 

 homogeneous, for it contains iron, 

 and perhaps some other substance. 



WHITE-STONE. Pelspathic granite, 

 called by the French Eurite, and 

 by Werner Weiss-stein. 



WHOKL. In conchology, a wreath, 

 volution, or turn of the spire of a 

 univalve; the axis of revolution is 

 termed the columella, and the turns 

 of the spiral are denominated 

 whorls. 



2. In botany, a species of inflores- 

 cence, in which the flowers sur- 

 round the stem in the form of a 

 ring ; also applied to leaves, when 

 they arise in a circle round the 

 stem. 



WING. 



1. The limb of a bird or insect by 

 the aid of which it is able to fly. 



2. In botany, a membranous appen- 

 dage to some seeds, serving to waft 

 them along in the air; applied 

 also to the two side petals of a 

 papilionaceous corolla. 



WINGED. Having wings. In botany, 

 applied to stems, when the angles 

 are extended into leafy borders; 



