18 



Smaller, more transparent, and with the spire more bent than 

 ihe last ; the outer lip less expanded, the notch completely dividing 

 the peritreme, and the columella convex. Found on small plants 

 in woods, in the Philippine Islands. 



Sec. 2. Spire nearly straiyht. 



3. P. lubrica. (pi. iv. f. 12 to 16.) nobis. Zool. Proc. 1842. 



T. sub-obliqua, cylindrica ; spira brevi obtusa ; apertura rotun- 

 data; margine antice sub-expanso, paululum incrassato, ad basin 

 columellae vix emarginato ; columella callosa. 



In this species the notch is scarcely perceptible, and there is a 

 rounded callosity behind the columellar lip. The inner lip is 

 thickened on the body whorl. Found in dense woods on small 

 plants in the Philippine Islands. 



4. P. vitrea. (pi. iv. f. 6, 7 ) nobis. Zool. Proc. 1842. 



T. sub-elongata, recta ; anfractibus sub-rotundatis, margine 

 expanso, reflexo, complanato, incisura diviso. 



The spire is straight and elevated, gradually tapering towards 

 the obtuse apex ; the peritreme is expanded and flattened, the 

 notch deep. Mindinao and Luzon, Philippines. 



5. P. similis. (pi. iv. f. 4, 5.) nobis. Zool. Proc. 1842. 



T. fulva, sub-elongata, recta ; anfractibus sub-rotundatis; mar- 

 gine pallide fulvo, expanso, reflexo, rotundato, crasso ; incisura 

 usque ad dorsum diviso. 



Resembling P. vitrea, but the margin not flattened, and the 

 notch so deep that it is seen at the back of the shell. Found on 

 leaves of bushes and trunks of trees in the Island of Luzon, 

 Philippines. 



6. P. extgua. (pi. iv. f. 17.) nobis. Zool. Proc. 1842. 



T. parva, translucida, alba, cylindrica ; anfractu penultimo 

 inflato; margine apertune paululum incrassato, incisura diviso. 



This small, transparent white species has the margin very little 

 thickened, and the notch deep. Found on small plants in the 

 Philippine Islands. 



Sec. 3. Spire straiyht, with a notch at both ends of the aperture. 



7. P. humilts (pi. iv. f. 2.) Jacquenot. 



T. ovali, solida, pallide lutea. ; anfractibus sub-rotundatis, 

 ultimo prope aperturam paululum complanato; apertura rotun- 

 data, margine ciasso, expanso, reflexo ; labio interno crasso, postice 

 plicato; columella crassa, lata, tortuosa, reflexa.; incisura ad dorsum 

 hta. 



This being a dead shell has lost the brilliancy of the enamel. 

 The teeth or folds at the posterior part of the inner and outer lips 

 form a very distinct canal. The columella is tortuous and turned 

 backwards, and the notch is seen at the back like the corresponding 

 part of a Buccinum. 



