PLATE I. 
Figs. 1—5, ANcuiIstoma cretacrum, Séol.; p. 9; 1, front view of a small specimen showing 
the teeth of the inner lip; 2, basal view of the interior whorls of a larger 
specimen, to exhibit the sharp edge round the umbilicus in the young shell; 3, 
and 3 a, upper-and front-views of a nearly complete specimen, and 3 4, the exterior 
termination of the last whorl to show the dentition of the outer lip; 4, front-and 
basal-views of a much depressed specimen; 5, front-and upper-views of a com- 
plete specimen ; 5 a, showing the lateral depression of the last whorl near the 
aperture. All the figures are enlarged twice, and the natural size is given in the 
accompanying cross-lines representing the diameter and the height; all speci- 
mens are from near Comarapolliam (N. of Arrialoor), in the drrialoor group. 
Fig. _... 6. Ancuisroma ArriaLoorense, Sto/.; p.10; upper-front-and basal-views of aspecimen 
of twice the natural measurements, the shell surface is partly not preserved, and 
the probable shape of the aperture is restored in outline; from Ninnyoor, in 
the Arrialoor group. 
Fig. ... 7 Ancutstoma Arcorensg, Sfol.; p. 11; 7, 7a, 74, upper, basal-and front-views; 7e, 
lateral view of the last whorl (with the shell taken off) to show the form of the 
single tooth on the outer lip; the figures are enlarged to twice the actual 
measurements, which are given by cross-lines ; from Alwadanapooram, Trichinopaly 
group. 
Fig. ... 8. Macrocycerts Carnatica, Séol.; p.12; 8 and 8a, upper-and front-views of a some- 
what mutilated specimen; 84, is a restored outline of the probable shape of 
the specimen, and the difference in the thickness of these two is given in the 
accompanying cross-lines; the specimen is figured of the natural size; from near 
Veraghoor, in the Arrialoor group. 
