366 Gatlijf and Gabriel : 



angles by others of about double strength, but the spirals are 

 more numerous, the other whorls are ribbed longitudinally, the 

 ribs having a slight spiral trend • these ribs terminate a little 

 below the suture, the intervening space carrying rather closely 

 set angularly bent threads. Under the microscope these are 

 thickened at the base and sharp at the edge, resembling a 

 propeller-blade, their contour following the outline of the sinus. 

 Between the ribs the area is concave and cancellated, the spirals 

 are somewhat stronger and appear on the ribs. Outer lip thin, 

 crenate, sinus rather deep, not broad. Inner lip somewhat 

 concave ; channel short, slightly everted. 



Dimensions of Type. — Length, 4. ; breadth 1.75 mm. 



Locality. — Dredged between Phillip and French Islands, and 

 off Stony Point, Western Port. 



Obs. — Named after Mr. R. A. Bastow, to whom we are in- 

 debted for the skilled drawings of this and the other species 

 figured in this paper. 



Type in Mr. Gatlift's collection. 



Phasianella nepeanensis, sp. nov. 

 (PI. XXI., Figs. 9, 10). 



Shell small, smooth, globose, fragile ; spire scarcely exsert. 

 Whorls, five, rapidly increasing, aperture semi-circular, outer lip 

 sharp, inner lip curved, rimate. Colour, pink with white mark- 

 ings, which vary a good deal, but usually include a band of 

 rounded white spots on the shoulder of the body-whorl, and 

 another similar one just below the periphery. 



Size of Type. — Height, 1.7 ; width, 1.8mm. 



Locality. — Flinders, Western Port ; <~)cean Beach, near Point 

 Nepean. 



Obs. — The shape of this shell is so different to our other 

 species of the genus that it was with some hesitation we placed 

 it here ; but a comparison with a similar South African form, 

 P. neritina, Dunker, decided us to do so. Colour is not of much 

 use in determining species in this genus, as the markings vary 

 so greatly in the same species, but in the present instance they 

 appear to be fairly constant. 



Type in Mr. Gatliff's collection. 



