100 
Horizon and Localities . — Count Munster was the first to record this 
species in the Devonian limestone of Elbersreuth. Since then it has been found 
by D. A. Doemer in the Devonian beds of Terhach in the Harz, and by G. 
Sandberger in Nassau. Mr. Clarke has found two specimens of it in the 
black limestone of the Yass District. 
3. Loxonema Henna iiii, Sowerhij. 
Terehva Ilennaliii^ Sowei’b 3 % 1810, Trans. Geol. Soc. London, Y (2), pi. 57, fig. 22. 
Loxonema Heiinaliiana, J. Phillips, 1811, Pal. Poss, Cornwall, etc., p. 99, pi. 38, fig. 184. 
Shell small elongate, fusiform, composed of six to seven spiral whorls, 
hut little convex, suture linear. Spiral angle about 30° ; surface ornamented 
with a large number of fine longitudinal ridges, a little sinuous, formed by 
the successive growth of tiie shell ; the oval aperture is Avider than long. 
Dimensions. — Length, about ten millimetres ; diameter of the base, four 
millimetres. 
Horizon and Localities . — Lecorded first by Sowerby in the Devonian 
beds of the Plymouth District; in the Yass District associated with the 
preceding species, in black limestone. 
f. Loxonema depeeditem, Goldf ^( ss . 
Melania deperdita, Goldfnss, 1844, Petrcf. Germ., Ill, p. 119, pi. 197, fig. 12. 
LjOXOnema dep)erdita, A. d’Orbigny, 1850, Prodr. Pal., I, p. 63. 
Shell of rather large size, elongate, conical, composed of a great number 
of slightly enveloping sj)iral whorls, little convex, suture oblique, and surface 
quite smooth. Aperture elongate, oval. Spiral angle, about 20°. 
Observation . — The fragment of this sq)ecies that has been submitted 
to me is so imperfect that it is impossible to determine characters other 
than those I hai^e mentioned ; but still it agrees with such exactitude with 
the figure published l3y Goldfuss, and quoted above, that I do not hesitate to 
identify it vuth the sjiecies it represents. The only doubt I have is in 
respect to tlie genus under which it should be placed. The absence ol 
ornament on its surface makes me believe that it is not impossible that it 
should 1)0 classed Avitli Macrocheilns. 
