POSIDONIELLA. 81 



Genus Posidoniella, de KonincJe, 1885. 



Inoceramtts, J. de O. Sowerby, 1829. Mineral Conchology, vol. vi, p. 162, 



pi. dlxxxiv, fig. 2. 



— Goldfuss, 1836. Petref. Germ., vol. ii, p. 107, pi. cviii, fig. 5 a. 



— vel Posidonia, Phillips, 1836. Geol. Yorks., vol. ii, p. 211, pi. vi, 



figs. 3 and 4. 

 Modiola, Phillips, 1836. Ibid., p. 210, pi. v, fig. 24. 

 Peena? Phillips, 1836. Ibid., p. 247, pi. vi, fig. 14. 



Catillus, Capt. Brown, 1841. Trans. Mancbester Geol. Soc, vol. i, p. 225. 

 Posidonia, de Koninch, 1843. Ann. Musee E. Hist. Nat. Beige, vol. xi, p. 141, 



pi. vi, figs. 1 a and 1 b. 

 Inoceramus, Portlock, 1843. Eeport Geol. Londonderry, p. 423, pi. xxxiii, 



figs. 1—3. 

 Posidonomya, Morris, 1843. Cat. Brit. Foss., p. 118. 

 Modiola, Morris, 1843. Ibid., p. 91. 



Inocebamus, McCoy, 1814. Synop. Carbonif. Fossils Ireland, p. 77. 

 Posidonomya, Bronn, 1848. Nomenel. Palseont., p. 1034. 

 Posidonia, Brown, 1849. Illustr. Fossil Conchology Great Britain, p. 168, 



pi. lxvii, fig. 15. 

 Avicula, Brown, 1849. Ibid., p. 160, pi. lxvi*, figs. 9 and 10. 

 Catillus, Brown, 1849. Ibid., p. 166, pi. lxvii, fig. 5. 



Posidonomya, d'Orbigny, 1850. Prodrome de paleontologie stratigrapbique, p. 138. 

 ? Mytilus, de Ryclcholt, 1847. Melanges paleontologiques, part i, p. 132. 

 Posidonomya, Morris, 1854. Cat. Brit. Foss., 2nd edit., p. 181. 

 Ambonyciiia, 8. P. Woodward, 1854. Manual Mollusca, Part II, p. 261. 



— M'Coy, 1855. British Palaeozoic Fossils, p. 482. 

 Posidonomya, Eichioald, 1860. Letbsea Bossica, pt. i, p. 943. 

 Ambonycuia, Owen, 1860. Palaeontology, p. 57, fig. 3. 

 Tnoceramus, Griffith, 1862. Journ. Geol. Soc. Dublin, vol. iv, p. 93. 

 Ambonycuia, Young and Armstrong, 1871. Trans. Geol. Soc. Glasgow, vol. iii, 



Supplement, p. 45. 

 Posidonomya, Armstrong and Young, 1876. Catal. Western-Scottish Fossils, p. 52. 



— Meek, 1875. Palaeontology of Ohio, vol. ii, p. 333. 



— Bigsby, 1878. Thesaurus Devonico-Carboniferus, p. 293. 



— Etheridqe, 1885. British Fossils, vol. i, Palaeozoic, p. 275. 

 Posidoniella, de Koninch,- 1885. Ann. Musee d'Hist. Nat. Belgique, vol. xi, 



p. 184. 

 ? Myalina, pars, de Koninch, 1885. Ibid., p. 169. 



Generic Description. — Shell mytiliform, obliquely subquadrate, the posterior 

 portion expanded in the form of a wing. Very inequilateral, the anterior portion 

 of the shell being obsolete ; the umbones are pointed, directed forwards, and 



11 



