MOLLUSCA. — HEDLEY. 73 



reduced above to a thin smear of callus, below expanded iuto a 

 broad sinuous lobe aduate to the canal. Above are a few faint 

 wrinkles. Columella armed with about eight plications, the 

 upper short and deep seated, the lower running out almost to 

 the margin of the lobe and doubling by intercalation. Specimen 

 figured, 90 mm. long and 60 broad; another, 100 mm. long, 

 70 mm. broad. 



Hub. — Between Green Cape and Gabo Island, 50 to 100 

 fathoms. 



With it were associated, Cas&idea thomsoni, Brazier ; Fasciolaria 

 australasia, Perry ; Fusinus novce-hollandice, Reeve; Penion 

 maxima*, Tryon ; P. waitei, Hedley ; Charonia nodifer, var. 

 euclia, Hedley; Sca/phella fusiformis, Swainson ; Pecten bifrons, 

 Lamarck; Oardita raoidi, Angas ; and Chione chemnitzii, 

 Hanley. 



AKGOBUCCINUM BETIOLUM, Sj). aov. 



(Plate xi., fig. 5.) 



Shell ovately fusiform, large, light and thin, spire elevated, 

 body whorl two thirds of total length. Colour pale buff, within 

 the aperture an ochraceous margin. Whorls in all specimens 

 seen have a broken apex, on the best preserved example seven 

 whorls remain, inflated, parted by deeply contracted sutures. 

 Sculpture : — varices are irregular in position and development, 

 two, one or none to a whorl. The general surface is neatly 

 reticulated, on the last whorl twenty-two spiral cords intersect 

 thirty-five radials and project as small tubercles at the crossing 

 point, between the main cords run minute interstitial threads; 

 the penultimate carries twenty-seven radials and nine spirals. 

 Fragments remain of a thin olivaceous epidermis. Aperture 

 ovate, outer lip protected by a varix outside, simple within. At 

 the posterior angle a low, deep seated, entering ridge. Inner lip 

 with a thin callus margin. Canal open, short, broad, bent 

 slightly upwards and to the right. Length, 130 mm. ; breadth, 

 60 mm. 



This species belongs to the small subgenus Priene, hitherto 

 limited to America. From Triton scaler, King, 1 the type of that 

 subgenus, the Australian shell differs by its larger size, more 

 elongate form, longer canal and more open sculpture. It makes 

 the seventh member of the genus found in Australia, the others 



1 King — Zool. Journ., v., 1831, p. 3*8. 



