252 CARBONIFEROUS LAMELLIBRANCHIATA. 



Carbonicola acuta, var. rhohboidalis, Hind, 1894. Monograph, p. 55, pi. iii, 



figs. 13—21 ; pi. iv, figs. 1—7. 



— otalis, Martin, sp., 1809. Ibid., p. 56, pi. iv, figs. 18 — 22; pi. v, 



fig. 38. 



— polmontensis, BMnd, sp., 1838. Ibid., p. 58, pi. vii, figs. 1 — 4. 



— subconstbicta, Sow., sp., 1812. Ibid., p. 59, pi. vi, fig. 44 ; pi. vii, 



figs. 5—12. 



— obtusa, Hind, 1894. Ibid., p. 61, pi. vii, figs. 16 — 23; pi. xi, 



figs. 1, 2. 



— mjCTJLAEis, Hind, 1894. Ibid., pp. 63, 174, pi. vii, figs. 24 — 42 ; 



pi. ix, fig. 11 ; pi. xi, figs. 14 — 16 ; pi. 

 xxi, fig. 8. 



— gibbosa, Hind, 1894. Ibid., p. 65, pi. viii, figs. 1, la, 1 b, 2. 



— subeotunda, Brown, sp., 1843. Ibid., p. 65, pi. viii, figs. 3 — 7. 



— tuegida, Brown, sp., 1843. Ibid., p. 66, pi. viii, figs. 8 — 25. 



— aquilina, Sow., sp., 1840. Ibid., p. 69, pi. v, fig. 2; pi. ix, 



figs. 1—10, 12—37; pi. x, figs. 1—42; pi. xi, 

 figs. 31—33. 



— angtjlata, de Ryckholt, sp., 1850. Ibid., p. 75, pi. xi, figs. 3 — 5. 



— siwilis, Brown, sp., 1843. Ibid., p. 76, pi. xi, figs. 6 — 13, 15, 



17—23, 25—27. 



— cuneifobmis, Hind, 1894. Ibid., p. 78, pi. xi, figs. 24, 24 a. 



— antiqua, Hind, 1894. Ibid., p. 79, pi. xi, figs. 28—30. 



— elegans, Kirkby, sp., 1880. Ibid., p. 81, pi. xx, figs. 12 — 15 a. 



Genus Antheacomya, Salter, 1862. 



(See ' Monograph on Carbonicola, Antliraconiya, and Naiadites.' Pal. Soc, 1894, p. 83.) 



Generic Characters. — Shell very slightly inequivalve, inequilateral, posterior 

 end compressed, expanded, and truncate ; umbones small, from which a rounded 

 oblique ridge passes towards the postero-inferior angle. 



Interior. — Muscle-scars shallow, as in Carbonicola. Hinge-plate small, with a 

 cardinal and one long posterior lateral tooth. Pailial line non-sinuate. 



Exterior. — Surface concentrically striate, with thickened wrinkled perios- 

 tracum. 



Species. 



Anthracomta Adamsii, Salter, 1861. Monograph, 1895, p. 89, pi. xii, figs. 



1—19. 



— — var. expansa, Hind, 1894. Ibid., p. 91, pi. xiii, figs. 



1—3. 



— dolobeata, Sowerby, sp., 1840. Ibid., pp. 93, 176, pi. xiii, figs. 4 — 



9, 11 ; pi. xxi, figs. 13 and 15. 



