TURNUS. 235 
Turnus, sp. Plate XXXVIII, fig. 18. 
A specimen from the Upper Greensand of Blackdown resembles the species 
from the Gault, described above, but the concentric ribs are finer and more 
numerous, and the dorso-ventral furrow is narrower. The exterior of a left valve 
only is preserved and is associated with large and rather irregular tubes. 
TURNUS ? AMPHISBANA (Goldfuss), 1831. Plate XX XVIII, figs. 19, 20. 
1822. 
1831. 
? 1839. 
1840. 
1841. 
1842. 
1845. 
1845. 
1846. 
? 1850. 
1850. 
1851. 
? 1852. 
1854. 
1863. 
1864. 
Trerepo, G. Mantell. Foss. 8. Downs, p. 207, pl. xviii, fig. 23. 
SERPULA AMPHISBHNA, A. Goldfuss. Petref. Germ., vol. i, p. 239, pl. Ixx, 
fig. 16. 
CrramBycitEs, sp., H. B. Geinitz. Char. d. Schicht. u. Petref. des siichs. 
Kreidegeb., pt. 1, p. 13, pls. i1i—vi. 
TEREDO AMPHISBEHNA, J. de C. Sowerby. Min. Conch., vol. vii, p. 17, pl. 
dexviil, figs. 1—5 (Teredo articu- 
lata on the plate). 
SERPULA AMPHISBENA, FF’. A. Rimer. Die Verstein. d. nord-deutsch. 
Kreidegeb., p. 100. 
_ _ H. B. Geinitz. Char. d. Schicht. u. Petref. des 
siichs.-boéhmisch. Kreidegeb., pt. 3, 
p- 695. 
FIsTULANA AMPHISBHNA, H. B. Geinitz. Die Verstein. von Kieslingswalda, 
p. 11, pl. iv, figs. 11—14. 
SERPULA AMPHISBAHNA, A. H, Reuss. Die Verstein. der bohm. Kreideformat., 
pt. 1, p. 19, pl. v, figs. 29—32. 
GasTROCHHNA? (TEREDO?) AMPHISBaNA, H. B. Geinitz. Grundr. d. Ver- 
stein., p. 396. 
FIsTULANA AMPHISBaNA, P. de Ryckholt. Mélanges Paléont. i (Mém. cour. 
et Mém. des sav. ¢trang., vol. 
xxiv),p.117, pl. v, figs. 19—22. 
TrEREDO AMPHISB@NA, J. de C. Sowerby, in F. Dizon. Geol. Sussex, p. 354 
(p. 385, ed. 2), pl. xxviii, fig. 35. 
GASTROCHEHNA AMPHISBENA, J. Miiller. Petref. der Aachen. Kreidef., pt. 2, 
p- 63. 
—- a ?, R. Kner. Denkschr. d. k. Akad. d. Wissensch. 
Wien, Math.-nat. Cl., vol. in, 
p. 310, pl. xvi, fig. 18. 
TEREDO AMPHISBANA, J. Morris. Cat. Brit. Foss., ed. 2, p. 227. 
GASTROCHHNA AMPHISBHNA, BR. Drescher. Zeitschr. d. deutsch. geol. 
Gesellsch., vol. xv, p. 341. 
— FJ. Pictet and G. Campiche. Foss. Terr. Crét. 
Ste. Croix (Mat¢ér. Pal. Suisse, 
ser. 4), p. 19. 
