﻿174 DEVONIAN FAUNA. 



L. Bcemeri, Kayser, though a much smaller fossil, also seems the same. 

 Kayser distinguishes his shell, which is the same as L. subulatum, Romer, ' Beitr.,' 1 

 from L. subulatum, Romer, ' Harz.,' 3 which is a very different shell, being much 

 more elongate and having much broader whorls. 



L. angulosum, Barrois (not F. A. Romer), is also evidently the same shell. 



Affinities. — L. nexile differs from this species by having twice as numerous 

 and more recurved ridges, and broader whorls. 



L. angulosum, F. A. Romer, 3 differs in being slightly keeled above, in having 

 fewer stria?, and in being a very much shorter shell. 



L. funatum, F. A. Romer, 4 has the stria? much more twisted and prominent. 



L. reticulatum, Phillips, 5 is distinguished by its shorter spire, greater apical 

 angle, and by its spiral threads. 



Holopella moniliformis, F. A. Romer, 6 seems only to be distinguished by its 

 having considerably longer whorls. 



Loxonema terebra, F. A. Romer, 7 has much broader whorls, coarser striae, and 

 apparently a much more elongate form. 



Loxonema terebra, Hall, 8 chiefly differs in having its stria? more numerous and 

 recurved. Whether Hall, who does not quote Romer, intended, by using the 

 same name, to identify this species with the German shell I cannot say ; but, after a 

 careful comparison of the figures of the English, American, and German (Romer's) 

 shell, I think that there is reason to believe that the latter (which is very poor 

 and indistinct) represents a different species from either of the former. 



A Carboniferous shell, Rissoa ? Lefeburii, Leveille, 9 is, judging from Leveille's 

 figure, so similar that it might well be identical ; but it does not seem safe to 

 assume this, or to use Leveille's name for the Devonshire shell, for as figured by 

 Goldfuss this Belgian species is a much shorter shell with finer stria?, and it has 

 been united by Bronn 10 and others, with Melania subsulcosa, Phillips, 11 which 

 differs from our Devonian shell in the same respects. 



1 1866, F. A. Eomer, ' Beitr.,' pt. 5, p. 8, pi. ii, figs. 4 a, b. 



2 1843, F. A. E6mer, ' Harz.,' p. 31, pi. viii, fig. 12. 



3 1850, F. A. Eomer, ' Beitr.,' pt. 1, p. 3, pi. i, fig. 5. 

 * 1855, ibid., pt. 3, p. 14, pi. iii, fig. 18. 



5 1841, Phillips, < Pal. Fobs.,' p. 139, pi. lx, fig. 187*. 



6 1866, F. A. Eomer, ' Beitr.,' pt. 5, p. 8, pi. ii, figs. 5 a, b. 



7 1850, ibid., pt. 1, p. 35, pi. v, fig. 15. 



8 1876, Hall, ' Illustr. Dev. Foss. Gast.,' pi. xiv, figs. 6, 7 ; and 1879, ibid., ' Pal.N. T.,' vol. v, 

 pt. 2, p. 48, pi. xiv, figs. 6, 7. 



9 1835, Leveille, 'Mem. Soc. Geol. Fr.,' vol. ii, pt. 1, p. 40, pi. ii, fig. 25. 



10 1848, Bronn, ' Handbuch,' vol. iii, p. 288. 



11 1836, Phillips, ' Geol. Torks.,' vol. ii, p. 228, pi. xvi, fig. 1 a. 



