1870. 
1873. 
? 1893. 
? 1895. 
1898. 
1902. 
CRETACEOUS LAMELLIBRANCHIA. 
TEREDO AMPHISBENA, I’, Romer. Geol. v. Oberschles., pp. 317, 340, pl. 
xxxiv, figs. 14, 15. 
GASTROCHANA AMPHISBEHNA, F’. Stoliczka. Paleont. Indica, Cret. Fauna 
8S. India, pp. 14, 29. 
— — H. B. Geinitz, Das Elbthalgeb. in Sachsen 
(Paleontographica, vol. xx, 
pt. 1), p. 2385, pl. li, figs. 
8—12. 
_ = D. Brauns. Geitschr. f. d. gesammt. Natur- 
wiss., vol. xlvi, p. 358. 
-~ -- A. Fritsch. Stud. im Gebiete der bohm. 
Kreideformat. 11, Weissenberg. u. Malnitz. 
Schicht., p. 122, fig. 93. 
== _ G. Miller. Jahrb. d. k. preussisch. geol. 
Landesanst. fiir 1887, p. 436. 
a -- A. Fritsch. Stud. im Gebiete der béhm. 
Kreideformat. iv, Teplitz. 
Schicht., p. 79, fig. 67. 
_- — O. Griepenkerl. Senon. v. Konigslutter (Pal- 
eont. Abhandl., vol. iv), 
p. 69) ( pl: vay ig. 1): 
? ~~ ~- E. Holzapfel. Die Mollusk. Aachen. Kreide 
(Palezontographica, vol. xxxv), p. 1438. 
= = Fritsch. Op. cit. v. Priesen. Schicht., p. 96, 
fig. 113. 
P — _— F. Vogel. Hollandisch. Kreide, p. 49, pl. i, 
fig. 13. 
= — R. Leonhard. Kreideformat. in Oberschles. 
(Paleontographica, xliv), p. 
58, fig. 8. 
TURNUS AMPHISBHENA, G. Miiller. Mollusk.d. Untersenon v. Braunschweig 
u. Ilsede (Abhandl. d. k. preuss. geol. 
Landesanst., N. F., Heft 25), p. 79, 
ploxenie. 12: 
=o > A, Wollemann. Fauna der Liineburg. Kreide (Ab- 
handl. d. k. preuss. geol. Landes- 
anst. N. F., Heft 37), p. 81. 
Description.—Tubes long, conical, tapering gradually, sometimes nearly straight, 
but usually bending or curving irregularly, circular in section, but often com- 
pressed, and then showing a median longitudinal furrow on one side. Diameter 
sometimes reaches 15 mm. and the length 210mm. 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 by various authors to five different genera, but 
