The Transition from Rostro-Carinate Flint Implements to the Tongue-Shaped Implements of River-Terrace Gravels . Dorsal Surface Ventral surface Reel. Dore&lplatform Post. Left lateral surfaceFig. 1. If the reader will now apply Sir Ray Lankesters description of a rostro-carinateflint implement to the specimens illustrated (Plate 51, figs. 1-4; Plate 52, figs. 1-4;Plate 53, figs. 1-4 ; Plate 54, figs. 1-4 ; Plate 55, figs. 1-4), it will be realised thatthese implements, though of palaeolithic river-drift age, are of the rostro-carinate type,but they are better made and more highly evolved than t
The Transition from Rostro-Carinate Flint Implements to the Tongue-Shaped Implements of River-Terrace Gravels . Dorsal Surface Ventral surface Reel. Dore&lplatform Post. Left lateral surfaceFig. 1. If the reader will now apply Sir Ray Lankesters description of a rostro-carinateflint implement to the specimens illustrated (Plate 51, figs. 1-4; Plate 52, figs. 1-4;Plate 53, figs. 1-4 ; Plate 54, figs. 1-4 ; Plate 55, figs. 1-4), it will be realised thatthese implements, though of palaeolithic river-drift age, are of the rostro-carinate type,but they are better made and more highly evolved than those found below the RedCrag and in other pre-river-valley deposits. The two other specimens illustrated(Plate 56, figs. 1-4) and (Plate 57, figs. 1-4), though exhibiting the beak-like profile,cannot be regarded as true rostro-carinates owing to the fact that they do not possessthe more or less flat ventral plane. Four views of each of the seven implements aregiven and their various characteristics are indicated clearly (Ant. = Anterior andPost. = Posterior). A sectional drawing of each specimen is also provided. An Explanation of the Pec
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Keywords: ., bookcentury1900, bookdecade1920, bookidphiltrans003, bookyear1920
