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DESCRIPTION OF A NEW SPECIES OF PUPINA 

 FROM QUEENSLAND. 



By C. E. Beddome. 



PUPINA BIDENTATA, Sp.n. 



■Taw consisting of a chitinous, transparent membrane covering 

 the greater part of the lips, minutely reticulated ; under high 

 magnifying power the membrane appears to 

 be composed of very numerous rectangular 

 plaits. 



^ac?it/a strap-shaped, with about 75 oblique 

 rows of teeth; formulae 2-1-1-1-2. Rhachi- 

 dian tooth with its base constricted in the 

 middle, posterior and concave; there are three 

 rather small cusps, the median one much 

 larger than the laterals, with small, broadly 

 rounded cutting points. Lateral teeth elon- 

 gated, with three cusps, the median with 

 a large blunt cutting point. First marginal with three, second 

 with two cutting points. 



The dentition is that characteristic of the Cydophoridce, and 

 the peculiarity of the jaw, if that term may be applied, is shared 

 by the arboreal Achatinellas. 



Shell pupiniform, shining translucent, 

 pale horn colour. Whorls 6g, gently 

 convex. Aperture circular, the greater 

 part of which is encircled by less inflated 

 margin of inner lip; peristome elsewhere 

 3 markedly thickened and reflexed with 

 , whitish sinuous porcelain-like margin, 

 notched or slit narrowly and tortuously 

 anteriorly and posteriorly; the thickened 

 and backward bent extremities of inner 

 and outer lip slightly diverge, forming two inbs on body whorl 



