. Description of the test specimen of the rostro-carinate industry found beneath the Norwich Crag . he keel, or carina, which separates the right and left slopesor .sculptured sides (right and left lateral surfaces) of the implement. In theschematic drawing the keel is continued as a sharp edge to the extreme anterior The specimen (the Norwich test specimen of a rostro-carinate implement) has beentemporarily placed by Dr. Allen Sturge in the Ethnological Department of the British Museum,Bloomsbury, where it can be examined by visitors. 6 Sir Eay Lankester.—Description of the Test Specimen of t
. Description of the test specimen of the rostro-carinate industry found beneath the Norwich Crag . he keel, or carina, which separates the right and left slopesor .sculptured sides (right and left lateral surfaces) of the implement. In theschematic drawing the keel is continued as a sharp edge to the extreme anterior The specimen (the Norwich test specimen of a rostro-carinate implement) has beentemporarily placed by Dr. Allen Sturge in the Ethnological Department of the British Museum,Bloomsbury, where it can be examined by visitors. 6 Sir Eay Lankester.—Description of the Test Specimen of the termination of the implement, the converging lateral surfaces separated by thekeel or ridge giving the anterior portion of the implement the form of a birdsbeak. In the Norwich specimen the anterior third of the keel does not (as it doesin many of these rostro-carinate implements) maintain the form of a narrow edge,or arSte, but is somewhat widened by small chippings which have apparently beenapplied for the purpose of giving the anterior region a downward curvature and LeftLateralsarfbcei. VENTRAL VIEW. Dorsalplane. Pointdfbedk} LtFT LATERAL VIEIW Text Fig. 3.—Diagrams showing the ideal form aimed at by the makers of the rostro-carinateflint implements or Eagles Beaks (Bees daigle). A, anterior ; P, posterior ; R, right;L, left. (From the Phil. Trans., Roy. Soc, May, 1912.) symmetry somewhat resembling that of the corresponding part in the beak of anaccipitrine bird or that of the bow of a rowing-boat. The keel (carina orarSte separating the anterior areas of the right and left sides of the implement) isnot exactly true to the middle line in the Norwich specimen. The workmans Rostro-Carinate Industry found beneath the Norivieh Crag. f blows, in removing large flakes from the right and left sides, have resulted ingiving the main arete or keel a divergence to the left from the mid-line. It isnot surprising that in such work the artist should fail to obtain the perfectsymm
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Keywords: ., bookauthorlankestererayedwinray, bookcentury1900, bookdecade1910
