SOLENOMYID^. 435 



curvature of the borders be taken, the posterior end is shown to have been much 

 broader than the drawing woukl indicate. 



Tellinomorpha cuneiformis is much more transverse and less gibbose than 

 T. jucnnda. 



It would appear, from the conformation of the posterior part of the hinge- 

 line, that the valves were not in contact posteriorly, and that the shell gaped 

 widely in this position. PL XLIX, fig. 5, seems to show this conclusively; but 

 there is strong evidence that the valves were closed in front. 



Two very perfect specimens have been obtained by Mr. John Smith of 

 Kilwinning from the Lower Limestone series of Scotland. One, PL XLIX, 

 fig. 5, has the outer tuberculate layer of the shell wanting, but it is not 

 crushed, and shows the peculiar escutcheon and the gaping posterior end very 

 perfectly. The other, PL XLIX, fig. 6, is somewhat crushed, so that, seen from 

 above, its special characters have been obliterated, and it appears to have no 

 escutcheon; but, on the other hand, the condition of the valves is so well preserved 

 that the rows of radiating tubercles are easily seeu, even by the naked eye. 



Family— SOLENOMYID^, J. E. Gray. 

 Genus — Solenomya^ [Solemya], Lamarck, 1819. 



Soi.EMTA, Phillips, 1836. Greol. Yorks., pt. 2, p. 209. 



— de Koninclc, 1842. Anini. Foss. Terr. Carb. Belg., p. 59. 



— Portloch, 1843. Geol. liep. Loudonderr}-, p. 441. 



— Morris, 1843. Cat. Brit. Foss., 1st edit., p. 101. 

 Sanguinolites (pars), M'Coy, 1844. S-jnops. Carb. Foss. Ireland, p. 50. 

 Solemya, de Verneuil, 1845. (xeol. Eussie, vol. ii, p. 294. 



Janeia, King, 1849. Permian Fossils England, p. 177. 

 Solemya, d'Orhigny, 1850. Prodrome paleontoL, vol. i, p. 129. 



— (pars), de RycTchoU, 1853. Mel. paleontoL, 2e partie, p. 49. 



— Morris, 1854. Cat. Brit. Foss., 2nd edit., p. 224. 

 Solenimya, M'Coy, 1855. Brit. Pal. Fossils, p. 518. 



— Cox, 1857. Geol. Surv. Kentucky, vol. iii, p. 573. 



— SJiumard and Swalloiv, 1858. Trans. St. Louis Acad. Sci., vol. i, 



p. 208. 

 Solenomya, EicJnvald, 1860. Lethisa Rossica, p. 1040. 



— Meek and Worthen, 1866. Geol. Surv. Illinois, vol. ii, p. 349. 

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



Supplement, p. 54. 



1 Tbis is BlainviUe's form of the word (1825). 



