Hostname: page-component-586b7cd67f-t7fkt Total loading time: 0 Render date: 2024-11-27T20:36:09.045Z Has data issue: false hasContentIssue false
  • English
  • Français

Notes on Two Species of the Genus Ampyx

Published online by Cambridge University Press:  01 May 2009

F. R. Cowper Reed
Get access Rights & Permissions [Opens in a new window]

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

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

page 206 note 1 La, Touche, Handbook to the Geology of Shropshire, 1884, 57, pl. iii, fig. 56.Google Scholar

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

page 206 note 3 Barrande, , Syst. Silur. Bohême, i, 1852, 636, pl. xxx, figs. 24–8.Google Scholar

page 206 note 4 Olin, , “ Chasmops o. Trinucleusskif. Skåne,” Medd. Lunds. Geol. Fältklubb, ser. B, No. 1, 1906, 69, t. iv, figs. 5–8.Google Scholar

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.

page 206 note 9 Cooper, , Amer. Journ. Sc., xx, 1930, 370, pl. iv, figs. 11–18.Google Scholar

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

page 207 note 2 Schmidt, , “ Rev. ostbalt. Trilob., Abt. IV” (Mem. Acad. Imp. Sc. St. Petersb., ser. vii, xlii, No. 5, 1894), 85, t. vi, figs. 29–33.Google Scholar

page 207 note 3 Reed, , Lower Palaeoz. Trilob. Girvan, pt. i, 1903, 17, pl. iii, figs. 6–7.Google Scholar

page 208 note 1 Angelin, , Palaeont. Scand., 1854, 80, t. xl, figs. 2, 2a; Warburg, Bull. Geol. Instit. Upsala, 1925, 225, pl. vi, fig. 10.Google Scholar

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