
STEADMAN AND COTTON—CLASSIPICATION OF THE COWRIES 507 
rounded, not spreading. Genera are: Austrocypraca Cossman, 1903, Cypraea 
contusa MeCoy, 1877 = Prolyncina, Schilder, 1927, Cypraea reever Sowerby, 1833, 
Although there are eight Tertiary fossil species of this genus, there is only one 
living species, reevei, confined to South-Western and South Australia, and it is 
taken alive in both shallow and deeper waters down to 100 fathoms, 
Subfamily Ta.pariinaE. 
One hundred and twenty millimetres in length or less; cylindrical, depressed ; 
extremities slightly produced; not umbilicate; spotted, speckled, or ringed; 
smooth; teeth fine, not produced across the base; margin not calloused; base 
slightly flattened, not spreading, Genera are Talparia Troschel, 18638, Cypraea 
talpa Tainné, 1758. Basilitrona Iredale, 1980, Cypraea isabella Linné, 1758, 
Arestorides Iredale, 1930, Cypraea argus Linné, 1758. Luria Jousseaume, 1884, 
Cypraea lurida Linné, 1758. Chelycypraea Schilder, 1927, Cypraca testudinaria 
Linné, 1758. Macrocypraea Schilder, 1930, Cypraea zebra Linné, 1758 = Cypraca 
exanthema Linné, 1767 = Hrythraea Morch, 1877, not Sowerby, 1839. 
The relationship of Macrocypraea zebra is with argus in shape and apertural 
features. 
BASMITRONA ISABELLA LEMURIANA subsp. nov. 
This name is introduced for the geographical subspecies of tsabella from Mada- 
gasear, the type locality, and the Lemurian Region. The shell is more gubovate, 
extremities attenuated rather gradually instead of abruptly coustricted, sides 
more callous, hind top of inner lip less distinctly constricted and never bent to 
the left; the extremities practically plain orange, without. brown or even blackish 
spots, The Schilders, 1939, recorded this subspecies as typical isabella, but isabella 
eomes from Amboina—-the Schildes ramphw introduced by them for the Malayan 
species is 4 direct synonomy for the typical isabella. 
KEY TO GENERA OF TALPARIINAE. 
a, Banded, 
b. Base dark brown. .. ve ‘a ba ve - aan -- Taipa 
bb. Base not dark brown. 
ce. Extremities dotted or coloured, 
d. Teeth fing, extremities orange He _. Basilitrona 
dd, Teeth coarser, extremities with two dark apota ate .- Luria 
aa. Spotted, speckled or ringed. 
@, Apeckled and blotched -3 an te 3 .. Chelyouprara 
ee, Not epeckled. 
. Ringed .. ate ‘ i ve 4 .. Arestorides 
ff, Spotted .. a An ee 2 7 .. Macraocypraca 
Subfamily Erronernas. 
Fifty millimetres in length or less; elongate eylindrical; extremities mode- 
rately produced; slightly umbilicate; dorsally blotched, regularly speckled or 
obscurely banded; smooth; teeth coarse or fine, not prodiiced across the base; 
margin weakly, moderately, or strongly calloused; base typically rounded, not 
spreading. Genera are: Hrronea Troschel, 1863, Cypraca errones Linné, 1758. 
Bistolida Cossmann, 1920, Cypraea stolida Linné, 1758. Derstolida Iredale, 
1980, Derstolida fluctuams Iredale, 1930, Talostolida Tredale, 1980, Cypraea teres 
Gmelin, 1791. Palangerosa Iredale, 1930, Cypraea cylindrica Born, 1780. Ova- 
