230 CRETACEOUS LAMELLIBRANCHIA. 



1870. Teredo amphisb^sina, J''. RiJmer. Geol. v. Oberschles., jip. ;517, 'S-iO, pi. 



xxxiv, figs. 14, 15. 



— Gastroch^ena AMPHiSBiENA, F. Sfoliczka. PalsDoiit. ludica, Cret. Fauna 



S. India, pp. 14, 29. 

 1873. — — I[. n. Gehilfz. Das Ell)thal<,'eb. in Sacliscn 



(Palfeontograpliica, vol. xx, 

 pt. 1), p. 235, pi. lii, figs. 

 8—12. 



1876. — — D. Braurnt. Zeitsclir. f. d. gesamiut. Natur- 



iviss., vol. xlvi, p. 358. 



1877. — — ■ A. Frilsch. Stud, iiu Gebiete der biilmi. 



Kreideformat. ii, AVeisseuberg. u. Malnitz. 

 Sehiclit., p. 122, fig. 93. 



1888. — — G. Miilhr. Jalirb. d. k. preussisch. geol. 



Landesaust. f iir 1887, p. 436. 



1889. — - — A. FritsrJi. Stud, ini Gebiete der bijlnn. 



Kreideformat. iv, Teplitz. 

 Scliicht., p. 79, fig. G7. 



— — — 0. Griepenkerl. Senou. v. Konigslutter (Pal- 



ffiout. Abhandl., vol. iv), 

 p. 69, (? pi. vii, fig. 1). 

 ? 1889. ? — — E. Hohapfel Die Mollusk. Aachen. Kreide 



(Palseoutographiea, vol. xxxv), p. 143. 

 ? 1893. — — Fritsch. Op. cit. v. Priesen. Scliicht., p. 9Q, 



fig. 113. 

 ?1895. ? — — F. Vogel. Hollundisch. Kreide, p. 49, pi. iii, 



fig. 13. 



1897. — — a. Leonhard. Kreideformat. in Oberschles. 



(Palaeontograpliica, xliv), p. 

 53, fig. 8. 



1898. TuRNUs AMPHiSB^NA, 6'. !/''//(;/•. Mollusk. d. Uuterseuon V. P>rauuscliweig 



u. Ilsede (Abhaudl. d. k. preuss. geol. 

 Laudesanst., N. P., Heft 25), p. 79, 

 pi. X, fig. 12. 

 1902. — — A. WoUemann. Fauna der Li'ineburg. Kreide (Ab- 



haudl. d. k. preuss. geol. Landes- 

 anst. N. F.. Heft 37), p. 81. 



Description. — Tubes long, conical, tajjering gradually, sonietiraes nearly straight, 

 but usually beudiug or curviiig ii'vegularly, circular in scrtioii, but often com- 

 pressed, and then showing a median longitudinal furrow on one side. Diameter 

 sometimes reaches 15 mm. and the length 210 mm. Surface with narrow^ transverse 

 ridges at more or less regular intervals giving a segmented appearance ; sometimes 

 also with smaller growth-rings between the ridges. 



Remarks. — This species ranges almost throughout the Chalk and is widely 

 distributed. It has been referred l)y various authors to five different genera, but 



