96 AUDITIONS TO THE TASMANIAN MARINE MOLLU8CA, 



AMPHITHALAMUS AURANTIOCINCTUS, Sp. Nov. 



Shell small, narrowly pyramidal, white, with two orange 

 bands. Whorls five, rounded, suture well impressed , 

 faintly axially costate ; first three whorls, and base smooth. 

 There is a narrow orange band at the periphery, which just 

 shows above the suture on the spire ; a second is on the 

 middle of the base. Aperture roughly quadrangular. 

 Columella straight and upright; behind it an umbilical 

 chink; outer lip sharp; the front lip bends back towards 

 the axis of the shell. 



Length 2.5. Breadth 1.4 mill. 



Type, with several others, mostly broken, from 40 

 fathoms, off Thouin Bay. It resembles A. erratica, May, 

 which is smaller, of a thinner texture, a rounder mouth, 

 and without the colour bands. 



PI. VI., fig. 33. 



AMPHITHALAMUS PERTUMIDUS, Sp. Nov. 



Shell minute, white, ovate, smooth. Whorls four, in- 

 cluding a rounded pullus, which is inclined to the left. 

 Whorls much rounded, contracting sharply to the im- 

 pressed suture. The third whorl projects tumidly to the 

 right, beyond the line of tho spire. Mouth oval el y pyri- 

 form, the outer lip forming a segment of a circle; colu- 

 mella lip somewhat expanded, obtusely angled in front. 



Length 2.2. Breadth 1 mill. 



Type from 40 fathoms, off Thouin Bay. with four others 

 Also from 100 fathoms, off Capo Pillar, three examples. 

 Co-types are mostly imperfect. 



Pi. VI., fig. 34. 



AMPHITHALAMUS TIARA, Sp. Nov. 



Shell minute, tumid, white, shining, with faint growth 

 lines. Whorls three and a half, very much rounded ; 

 suturo deeply impressed. The third whorl is much ex- 

 panded and flattened, giving the shell the appearance of 

 being crowned by a turban. Aperture large, oval, entire ; 

 lip expanded, particularly over the front of the columella. 



Length 2. Breadth 1 mill. 



Type, with three others, from 40 fathoms, off Thouin 

 Bay. 



PI. VII., fig. 35. 



EPIGRUS SEMICINCTUS, Sp. Nov. 



Shell small, narrowly elongate, smooth, chestnut or yel- 



