688 THE LAND MOLLUSCAN FAUNA OF BRITISH NEW GUINEA, 



its basal plate, which is twice as long as broad and slightly- 

 expanded posteriorly ; immediate laterals rather larger, similar in 

 shape, not attaining the basal margin, basal plate briefly alate, 

 distant laterals longer and slenderer ; marginals developing a 

 proximal accessory cusp, which assumes a sabre-like aspect and 

 increases in size as the ranks retreat j a distal accessory cusp is 

 also added. 



Genitalia (pi. XL., fig. 23) remarkable for the extremely long 

 ilagellum, which arises from a double knob at the summit of the 

 slender subcylindrical penis sac. 



C. chloritoides, Pilsbry. 



Jaw (pi. xxxix., fig. 17) boomerang-shaped, crossed by nine 

 elevated ribs, which denticulate both margins, ends smooth, 

 rounded. 



Radula (pi. XL., fig. 22) narrow, strap-shaped, three times as 

 long as broad ; formula 127 rows of 24 : 11 : 1 : 11 : 24 ; rachidian 

 unicuspidate, linguiform, extending more than half way along its 

 basal plate ; laterals rather larger, slightly inclined, developing a 

 rudimentary distal accessory cusp, basal plate roughly a parallelo- 

 gram ; after four or five transition teeth the marginals show the 

 main cusp cleft and the distal accessory cusp much developed. 



With these species compare the anatomy of C. porteri, Cox 

 (Proc. Roy. Soc. Q'land, Vol. vi., pi. xv.). 



Hadra broadbenti, Brazier. 



Jaw (pi. xxxix., fig. 16) arched, boomerang-shaped, crossed by 

 eleven flat-topped ribs, which denticulate both margins and are 

 wider than their interstices, ends rounded, smooth. 



Radula (pi. xlil, fig. 35) strap-shaped, twice as long as broad, 

 rows bracket-shaped, bisinuate across the marginals; formula 160 

 rows of 57 : 12 : 1 : 12 : 57 ; rachidian two-thirds the size of the 

 immediate laterals, cusp simple, linguiform, with a small cutting 

 point, extending along three-quarters of its basal plate; immediate 

 laterals similar in shape, the remoter ones longer and slenderer ; 



