BY DR. J. c. COX. 569 



surface of the body whorl a deep dint (as of a groove worn by a 

 rope in wood) extends obliquely for a quarter of the circumference 

 of the shell and occupies the central third of the space between 

 the suture and the insertion of the columella. Suture deeply 

 impressed. Apex smooth, depressed, first whorl discoidal, first 

 two and a-half hemispherical. Aperture oblique, effuse anteriorly, 

 in outline distorted rhomboid, square anteriorly (not rounded as 

 in the figure), angled posteriorly ; peristome strongly thickened 

 and reflected throughout, callus on body whorl thin, transparent, 

 not defined at its limit and would scarcely be perceptible but for 

 the microscopically granulated surface which it shares with the 

 columella ; columella straight, continued from the base in the 

 direction of the axis of the shell, then sharply doubling by a 

 sigmoid flexure around the orifice of the anterior canal; this canal 

 presents exteriorly an arched ridge parallel to the columellar 

 margin and divided therefrom by a deep and narrow groove 

 resembling an umbilical crevice ; the position of the obsolete 

 posterior canal is marked by a small entering callous ridge (not 

 shown in my illustration) near the posterior angle of the aperture. 

 Length 8£, breadth 2 mm. 



Hah. — Cairns, North Queensland (Froggatt). 



Type in the Macleay Museum and in my collection. 



Generic characters should be derived from more than one species 

 and from more knowledge of the mollusc than the naked shell 

 affords. Awaiting anatomical details of the animal and the 

 discovery of fresh species in the unexplored wilds of Northern 

 Queensland, Papua, and Malaysia, I will leave conchological 

 students to construct a generic diagnosis, if they require one, 

 from the foregoing description of the type. Merely will I premise 

 that Hedleya, so-called in compliment" to my friend Mr. C. Hedley, 

 F.L.S., is undoubtedly an aberrant member of the Pupinidse, as 

 indicated by its anterior and posterior canals; whilst their unusual 

 position and development, and especially the peripheral scrobicu- 

 lation on the body whorl, effectually sunder it from all known 

 forms. 



