26 ON SOME OF THE INTRODUCED PLANTS OF QUEENSLAND. 



permanent Hbus, ultim. anfr. evanidis, interstitiis regulariter striatis ; 

 apertura late ovata, postice attenuata, lahro tenui, anticeprodacto, labio 

 rejlexo, haud lato, periplieria obtuse vel subacute angulata. Alt. 10-20, 

 lat. 3i-8. 



Shell elongate, pyramidal, intense olive, opaque, solid ; whorls 

 7, always decollate, almost flat, scarcely sloping, elegantly ribbed ; 

 ribs regular, close, rounded, slightly curved, remaining the same 

 from suture to suture and disappearing on the last whorl, interstices 

 regularly striate, aperture widely ovate, attenuated posteriorly, 

 labrum thin, produced in front, lip reflected, not wide, periphery 

 obtusely, or in small specimens, subacutely angular. 



I am not sure that this should not be regarded as a mere variety 

 of the M. Wilkinsonii. The ribs vary much in all the specimens, 

 and as they are faintly present in the last named shell and the 

 spiral grooves are the same, intermediate grades of the other 

 features may be found. They appear to occur in equal numbers 

 in the same localities. It may even be that all three species here 

 enumerated are varieties of one shell. I have not figured the 

 above, having no specimen sufficiently perfect. 



Explanation of Figures. 

 Plate IY. 

 Fig. 3. — llelania dahtulios. 

 ,, 4. — Melania Wilkinsonn, 



On some of the Introduced Plants of Queensland. 



By F. M. Bailey, F.L.S., Hon. Member Eoyal Society, 



Tasmania, and Cor. Mem. Linn. Soc, N. S. W. 



Any one who has paid attention to the vegetation of the Colonies 

 cannot have failed to remark how rapidly the flora of the country 

 is being altered by the introduction of foreign plants. Proceeding 

 from the settled districts the strangers soon spread far into the 

 interior — some rapidly, some very slowly, some abundantly and 



