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Notes on Two Species of the Genus Ampyx

Published online by Cambridge University Press:  01 May 2009

F. R. Cowper Reed
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Extract

HEAD-shield acutely triangular. Glabella elongated, subpentagonal, widest across middle, gently convex or subcarinate, without furrows or lobes, having anterior half freely projecting in front of cheeks and produced into a long slender straight horizontal spine grooved along its upper and lower surfaces, fully twice the length of the glabella. Axial furrows nearly straight, diverging anteriorly, with a small deep slit-like pit at their anterior end. Fixed cheeks smooth, broadly triangular, nearly equilateral, reaching half-way up the glabella, with posterior lateral angles slightly curved back. (Free cheeks unknown). Facial sutures slightly sigmoidal. Pleuro-occipital furrow straight, strong, marking off rather broad band-like occipital segment; meso-occipital furrow and segment scarcely defined, smooth, without median tubercle.

Type
Original Articles
Information
Geological Magazine , Volume 69 , Issue 5 , May 1932 , pp. 205 - 209
Copyright
Copyright © Cambridge University Press 1932

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References

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page 206 note 2 Raymond, , Bull. Mus. Comp. Zool. Harvard, lxvii, No. 1, 1925, 30.Google Scholar

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page 206 note 5 Angelin, , Palaeont. Scand., 20, t. xvii, fig. 2.Google Scholar

page 206 note 6 Nicholson, and Etheridge, , Mon. Silur. Foss. Girvan, fasc. 2, 1879, 180, pl. xii, figs. 9–12; Reed, Lower Palaeoz. Trilob. Girvan (Palaeont. Soc.), pt. i, 1903, 21, pl. iii, figs. 11, 12.Google Scholar

page 206 note 7 Raymond, , op. cit., 39, pl. ii, figs. 8–10.Google Scholar

page 206 note 8 Ibid., 40, pl. ii, figs. 11, 12.

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page 207 note 1 Reed, , Palaeont. Ind., n.s., vi, Mem. 1, 1915, 25, pl. v, figs. 4–6.Google Scholar

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page 208 note 2 Angelin, , op. cit., 80, t. xl, figs. 3, 3a–c.Google Scholar

page 208 note 3 Ibid., 80, t. xl, figs. 1, 1a; Schmidt, op. cit., 1894, 84, t. vi, figs. 24–6; Hadding, Kongl. Fysiogr. Sällsk. Handl., n.f., Bd. 24, No. 15, 1913, 74, t. vii, fig. 17.

page 209 note 1 Raymond, , Bull. Mus. Comp. Zool. Harvard, lxvii, No. 1, 1925, 30.Google Scholar