40 
(^ASTEKOPODA. 
PSEUDAMAUllA, Fischer, 1885. 
(Man. Conch, ct Pal. Conch., Fas. S, 1S8.3, p. 767.) 
Ohs. — I 'would tentatively sug-gest tluit the t^vo following shells 
{Natica variahiUs, Moore, and Delphiuula reJJecla, Moore) may possibly he 
referable to Eischer’s genus Fsemlamaura, typified by Natica hulhiformis, 
J. de C. Shy., of the South Indian Cretaceous. Tliis and allied forms were 
referred by Stoliezka to Ampulliua, Lamk., with these remarks : — “ The shell 
is characterised by the ceiitricose form of the last volution and a thick inner lip, 
either leaving a slight fissure exposed at the termination of the columella, or 
more frequently covering Ihe entire central portion of the basis. Many of 
them very mneli resemble in their form some species of Ampullaria and also 
of Euspira, hut they are readily distinguished from them by a greatly 
thickened inner lip, which is closely attached to the shell. The spire is 
pointed and more or less elevated, hut seems to vary very considerably, even 
within the limits of one and the same species.” ^ 
In AmpuUina, Stoliezka places Natica bulbiformis, J. de C. Shy., N. 
bulimoides, D’Orb., and N. requieana, D’Orh., all allied species. How 
closely onr Australian shells agree 'with the above definition the following 
descrij)tions Avill show. I think it not improbable that future researches will 
ultimately indicate an even closer relationship. It may, hoAvever, be noted 
that Natica bulbiformis is placed by two recent American writers (Messrs. 
C. L. Herrick and D. W. Johnson) in Amaurop>sis, Morch.- 
PSEUDAMAUEA VARIABILIS, Moorc. 
(PI. II, Figs. 9-12.) 
Natica variabilis , Moore, Quart. -lourn. Gcoi. Soc., 1870, XXA^I, p. 256, t. 10, f. 15. 
? Natica lineata, Etheridge, Quart. Journ. Geol. Soc., 1872, XXA'III, p. 342, t. 21, f. 1. 
? Natica , SJA., Iludlestou, Geol. Mag., 1884, I (3), p. 339, t. 11, f. 4. 
? Natica variabilis, Tate, Proc. Austr. Assoc. Adv. Sci. for 1888 (1889), 1, p. 230. 
Natica variabilis, Eth. fd., Geol. Pal. Q’land, Ac., 1892, pp. 485 and 573, t. 31, f. 2 and 3. 
Natica variabilis, Giirich, Xeues .Tabrl)., 1901, Beil.-Bd. XIAh p. 489, t. 19, f. 7. 
Sji. Char. — Shell broader than high, inflated, spire of three or four 
volutions, i)ointed and variable in height, but the body Avhorl out of all pro- 
portion to the older in size; older Avhorls more or less straight-walled, slightly 
* Cret. Fauna S. India (Pal. Ind.), 1868, II (Gastropoda), Pts. 7-10, p. 295. 
^ Bull. Sci. Lab. Denison Univ., 1900, XI, Art. 9, t. 42, f. 2-4. 
