200 
HORN EXPEDITION-MOLLUSCA. 
Width. 
Height. 
Proportion. 
24 
21-5 
100 
90 
22 
19-5 
100 
88-6 
21-5 
17 
100 
84-3 
17 
13 
100 
76 (type specimen) 
17-25 
13 
100 
75-3 
15-5 
11-5 
100 
74-2 
15 
11 
100 
73-3 
14-5 
10-5 
100 
72-3 
16 
11-5 
100 
71-8 
14 
10 
100 
71-4 
14-75 
10 
100 
68-4 
15-75 
10-5 
100 
66-6 
The flatter forms make a near approacli to Planispira eyrei througli less 
planulate forms of that species. 
The sculpture of the majority of the lai’ge examples is in the form of fine 
engraved spiral lines on the body-whorl, which in rai’e instances becomes 
exaggerated as to produce a macro-ornamentation of tessellatedly-grouped rugo¬ 
sities ; a less number show only a feeble sculpturing, whilst in not a few it is 
obsolete. The majority of the dwarfed specimens fall into the two latter 
variabilities. The large forms recall the shape of Chloritis pseudoprunu/n, but 
they are devoid of the granulated test. 
Thersites (Badistes) gpandituberculata, Tate. (Plate XVIII., Fig. 11.) 
Reference —Hadra grandiiuherculata^ Tate, 1894, Trans. Roy. Soc. S. Aust., 
vol. xviii., p. 193. 
Shell globosely conical, spire elevated. Whorls five, of somewhat rapid 
increase, convex but slightly flattened at the suture, separated by a moderately 
impressed suture. Last whorl gradually descending to about the middle of the 
penultimate whorl, moderately inflated, flatly convex in front of the suture, gently 
curved on the side to the umbilical margin. Aperture oblong-elliptic, the major 
axis oblique; the plane of the aperture oblique to the vertical axis; margin 
lu’oadly expanded and reflected, united and reflected all round, the expansion of the 
columella on to the body and over the umliilicus is excessive; columella arched. 
Undulicus about one-Hfth the diameter of base. 
