150 



2. Harpa sulcosa, spec. nov. Plate vi., fig. lo. 



Shell ovate, ventricose ; spire shoi't, scalar, ending in a large 

 pullus of two smooth turns, the last turn subglobose, with the tip 

 laterally immersed. Ordinary whorls, two and a half, flatly 

 channelled at the suture ; ornamented with thin subdepressed 

 lamella?, about 40 on the last whorl, which terminate at the 

 shoulder in small vaulted scales ; interspaces indistinctly striate, 

 and inconspicuously distantly sjiirally lined. The flat or slightly 

 concave posterior area of the whorls spirally striated and traversed 

 by the depressed lamelLT. 



Aperture lunate, truncated posteriorly corresponding with the 

 sutural depression ; outer lip not thickened, sigmoidally curved. 



Dimensions. — Length, 19; breadth, 11-5; length of aperture, 15, 



Locality. — Lower beds at Muddy Creek. 



3. Harpa spirata, spec. nov. Plate vi., fig. 3. 



Shell oval-oblong, with a high subscalar spire, ending in a 

 liemispheric pullus. Ordinary whorls, three and a half, bluntly 

 angled in front of the suture, the jDosterior area flat or slightly 

 sloping upwards. Ornamented with stout depressed lamellae, 

 about 30 on last whorl, and distant spiral ribs about three on 

 penultimate whorl ; interspaces between the lamellae finely trans- 

 versely striate. 



Aperture oval-oblong ; outer lip thickened and reflected. 



Dimensions. — Length, 35 ; breadth, 22 ; length of aperture, 25, 



Locality. — Blue clays at Schnapper Point. 



4. Harpa cassinoides, spec. nov. Plate vi., fig, 4. 



Shell stout, biconic, with a very short somewhat acuminate 

 spire ending in a small papillary pullus of two turns. 



Ordinary spire-whorls two, medially angled, with a slight con- 

 cave posterior area ; ornamented with distant ribs which rise into 

 blunt tubercles on the angulation. 



Last whorl oval, ventricose, flatly rounded over the suture, and 

 rapidly attenuated at the base ; periphery with three equal and 

 equidistant lira? ; axial ribs twelve, subangular, sigmoid, some- 

 what elevated into blunt tubercles on the peripheral lira-. 



Apertin-e lunate ; outer lip ascending on the penultimate whorl, 

 very much thickened and somewhat patulously spreading. 



Dimensions. — Lengih, 28 ; breadth, 23 ; length of aperture, 27, 



Locality. — Well-sinking, iNIurray Desert. 



5. Harpa abbreviata, spec. nov. Plate vi., fig. 7. 



Shell thin, narrow-oval, with a short spire ending in a moderate 

 sized blunt apex. Ordinary spire-whorls two, subangulated 

 medially, with two spiral threads at the periphery, and orna- 

 mented by rather distant, hardly raised lamellie. 



