344 



slender, obtuse threads, about 25 at the widest part (sometimes 

 obsolete), minutely squamosely elevated at the intercrossing of 

 regular circumscribing stride. 



Dimensions. — Known only by fragments, the greatest diameter 

 of which is 2-5 ; diameter at the only partition observed, 1. 



Localities. — Eocene: Adelaide bore and " Turritella-beds," 

 Aldinga Cliffs. 



This species closely resembles in size and form Y. angiiillinuSy 

 Desh., of the Parisian Eocene, with actual specimens of which I 

 have made comparison, but differs from it by more distant 

 threads. 



EPPLANATION TO PLATES VI. TO X. 

 N.B. — The figures are of the natural size, except when otherwise stated. 



Plate VI. 



Fig. 



1. Natica sub-Noa^, Tate. Spring Creek, "Jx. 



2. Natica varians, Tate. Muddy Creek. 



3. Natica substohda, Tate. Muddy Creek. 



4. Natica gibbosa, Hut ton. Murray Desert. 



5. Natica Mooraboolensis, Tate. Moorabool River. 



6. Natica subinfundibuhim, Tate. Muddy Oreek. 



7. Natica balteatella, Tate. Phocene : Dry Creek-bore. 



8. Natica snbvarians, Tate. ALlinga Cliffs. 



9. Natica varians, Tate. Muddy Creek. 

 10. Natica subvarians, Tate. Gippsland. 



Plate VII. 

 Fig. 



1. Calyptraea subtabulata, Tate. Table Cape. 



2. Calyptraea crassa, Tate. Gippsland. 



3. Calyptraea undulata, Tate. Muddy Creek. 



4. Calyptraea placuna, Tate. Adelaide-bore. 



5. Heligmope Dennanti, Tate. jNIuddy Creek. 



6. Calyptraea corrugata, Tate. Muddy Creek. 



7. A young individual variation of C. craxna. 



8. Capulus circinatus, Tate. Adelaide-bore. 



9. Calyptropsis arachnoideus, Tate. Adelaide-bore. 

 10. vSigaretus microstira, Tate. Spring Creek. 



Plate VIII. 



Fig. 



1. Turritella Aldinga?, Tate. Adelaide-bore. 



2. Turritella Warburtoni, Ten. - Woods. Table Cape. 



3. Turritella Murrayana, Tate. River Murray Cliffs. 



4. Turritella acricula, Tate. River Murray Cliffs. 



5. Turritella septifraga, Tate. Spring Creek. 



6. Turritella Sturtii, Ten. - Ifoods. Table Cape. 



7. Turritella conspicabilis, Tate. Gippsland. 



8. Turritella tristira, Tate, var. Gippsland. 



9. Turritella platyspira, Ten. • Woods. Muddy Creek. 



10. Turritella pagodula, Tate. Gippsland. 



11. Turritella gemmulata, Tate. Muddy Creek. 



