NOTES ON THE HELICID^, BY C. HEDLEY. 121 



small ovate genital bladder is appressed against the accessory 

 gland of the epididymis, and the ovary is wound around its long 

 slender duct. 



Helix pachystyla, Pfr. % has the jaw arcuate, ends rounded, 

 crossed by a dozen narrow, sharp ribs, whose width equals that of 



their interstices, and which denticulate the cutting margin only. 



The odontophore carries a central tooth whose base is longer 

 than wide, half way up which the broader reflection develops a 

 central and two minute lateral cusps, the main ovate cusp not 

 attaining the basal margin. The laterals preserve the same size 

 and shape for twenty-eight series, exhibiting a single, slender, acute 

 cusp, with the distal, posterior, basal angle produced. 



To these succeed eleven transitional rows, whose teeth have an 

 accessory cusp half way up the proximal blade, and another at the 

 distal base. Beyond are about twenty irregularly dentate marginals. 



The genital system possesses a small, ovate, genital bladder 

 on a comparatively short stem ; the penis-sac is short, straight and 

 stout, the apex performing a half revolution. 



In the^ accompanying plate which illustrates these notes, the 

 various parts are distinguished by the usual lettering. 



For the specimens on which the above observations were made^ 

 as well as for other kind assistance, I am indebted to Mr. de Burgh 

 Birch, who collected these molluscs near the Proserpine Kiver. 

 Bowen. 



