BY C. E. BEDDOME. 



815 



enclosing a narrow triangular area which is crossed near the 

 thread-like slit of rounded aperture by a tooth-like process. 

 There is a finer tooth on lower extremity of outer lip which 

 further constricts the fine slit at aperture. 



Fi?. 4. 



Operculum concentric, concave, shining, straw colour. 

 Length 10 mil., diam. 4 mil., breadth of aperture 1| mil. 

 flab. — Near Cairns, Queensland. The type specimens are in 

 C. E. Beddome's Collection. 



EXPLANATION OF FIGURES. 



PupincL bidentafa. 



Fig. 1.— Jaw (x 50). 



Fig. 2. — Part of radula ( x 240). 



Figs. 3-4. — Front and back views of shell. 



(Figs. 1-2 drawn from nature by Mr. H. Suter; "Nos. 3-4 by Mr. C. Hedlcy.) 



