TURNU8. 2:35 



TuKNOS, sp. Plate XXXVIII, fig-. 18. 



A specimen from the Upper Greensancl of Blackdown resembles the species 

 from the Gaiilt, described above, but the concentric ribs are finer and more 

 numerous, antl the dorso-ventral furrow is narrower. The exterior of a left valve 

 only is preserved and is associated with large aud rather irregular tubes. 



TuRNUS ? AMPHiSB.Ex\A (Guldfuss), 1831. Plate XXXVIII, figs. 19, 20. 



1822. Teredo, G. MaiiteU. Foss. S. Downs, p. 2u7, pi. .wiii, fiy. 2-3. 

 1831. Sebpula amphisb^ena, A. GoJdfuss. Petref. Gremi., vol. i, p. 239, pi. Ixx, 



%'. 16. 

 r 1839. Ceeambtcites, sp., H. B. GtinUz. Char. d. ScLiclit. u. Petref. des siichs. 



Kreidegeb., pt. 1, p. 13, pis. iii — vi. 



1840. Teredo amphisb^na, /. de C. Sowerhy. Miu. Couch., vol. vii, p. 17, pi. 



dcxviii, figs. 1 — 5 {Teredo articu- 

 Ictta ou the plate). 



1841. Serpula amphisb.ena, F. A. RiViner. Die Verstein. d. uord-dtnitsch. 



Kreidegeb., p. 100. 



1842. — — H. B. Geiiiitz. Char. d. Schicht. u. Petref. des 



siichs. -bohmiscli. Kreidegeb., pt. 3, 

 p. 6.5. 



1843. Fistulana amphisb.ena, if. jB. ti'ci'/nVx. Die Versteiu. vou Kiesliugswalda, 



p. 11, pi. iv, figs. 11 — 14. 



1845. SERPrLA XM.vaisBj&j^\, A.E.Reuss. DieVersteiu.derbohni.Kreideformat., 



pt. 1, p. 19, pi. v, figs. 29—32. 



1846. Gastroch.5:na ? (Teredo r) amphisb^na, H. B. Geiiiitz. Gruudr. d. Ver- 



stein., p. 396. 

 ':* 1850. Fistulana amphisbjjna, P. de EycMolt. Melanges Pak'ont. i (Mem. eour. 



et Mem. des sav. eti-aug., vol. 

 xxiv),p. 117, pi. V, figs. 19—22. 



1850. Teredo amphisbcena, /. de C. Sowerhy, in F. Dixon. Geol. Sussex, p. 354 



(p. 385, ed. 2), pi. xxviii, fig. 35. 



1851. Gastroch^ina amphisb^.na, J. Midler. Petref. der Aaeheu. Kreidef., pt. 2, 



p. 63. 

 ?1852. — — ?, Ji'.A'we/-. Denksehr. d.k. Akad. d. Wisseusch. 



Wien, Math.-nat. CI., vol. iii, 

 p. 310, pi. xvi, fig. 18. 

 1854. Teredo amphisb.«na, J. Morris. Cat. Brit. Foss , ed. 2, p. 227. 



1863. Gastroch^na amphisbjena, li. Drescher. Zeitsehr. d. deutsch. geol. 



Gesellsch., vol. xv, p. 341. 



1864. — F. J. Pictel and G. Campiche. Foss. Terr. Cret. 



Ste. Croix (Mater. Pal. Suisse, 

 ser. 4), p. 19. 



