4 PLACOSTTLTJS. 



it also resembles in some respects, it is found not to be so elongate, 

 and the lines of growth are more oblique. 



Dimensions. — Height 26 mm. ; breadth 14^ mm. 



Form, and Loc. — Yellow Limestone (Travertine), probably of 

 Pliocene age : Hobart Town, Tasmania. 



96907. The type specimen figured by Sowerby. Pureliased. 



Genus PLACOSTYLUS, Albers. 



[Die Heliceen, 1850, p. 147-] 



Flacosffhts, Eeck (MS.), Index MoUuscorum, 1837, p. 57 (list 

 name only). 



Test imperforate, oblong, conical, rugosely striated; whorls to 

 the number of 7 or 8 ; columella twisted, plicated ; aperture 

 irregular but mostly ovate, or oblong ; peristome thick, having 

 an expanded and reflected callous margin, tuberculated neai' the 

 anterior extremity of the aperture. 



T>/pe. — Bulimus fihratus, Martyn. 



Placostylus, sp. 



An imperfect specimen in the Museum collection presents the 

 generic characters of Placostylus, but its condition precludes the 

 possibility of referring it accurately to any known species. It 

 nearest resembles the living P. hovinus, Brug., of N^ew Zealand, 

 and its close ally the variable P. fibratus, Martyn. 



Form, and Loc. — Post-Pliocene: King's Creek, Darling Downs, 

 Queensland. 



75373. One specimen. Presented by Richard Daintree, Esq. 



Family UMJSmiDM. 



Genus LIMN^A, Lamarck (em. Rang). 



[Lamlc, Mem. Soc. Hist. Nat. Paris, 1799, p. 75; Sander Rang, Man. Hist. 

 Nat. Moll. 1829, p. 176.] 



