78 



resemble A. mucronata, Sowerby, and it is possible that the latter 

 is a local variation of the former. 



Dimensions. — Length 41mm.; breadth 19'5 mm. ; length of 

 aperture 25 mm. 



Form, and Loc. — Pliocene and post-Pliocene : New Zealand and 

 Victoria. 



G. 5563. Two specimens of stunted growth, with callus spirally 

 corrugated ; from Limestone Creek, Glenelg river. Purchased. 



G. 9521. Several fragments of the spire, exhibiting subangulate 

 mucionation ; from Parimoa, Middle Island. W. B. D. Mantell Coll. 



G. 9514. A number of specimens showing wide range of 

 variation, the spires of some being acuminate, of others mucronate ; 

 from Wanganui. Sir James Hector Coll. 



G. 9520. An example of the adult, from Onekakara. 



Transferred from the Museum of Practical Geology. 



Family HARPID^. 



Genus HARPA, Lamarck. 



[Mem. Soc. Hist. Nat. Paris, 1799, p. 71.] 



Shell ovate, ventricose ; last whorl very large, ornamented with 

 regularly spaced longitudinal ribs, prolonged over the suture and 

 joined to preceding whorl; spire short; aperture wide, channelled 

 anteriorly, columellar border callous, the callosity extending over 

 part of the whorls, occasionally up to the protoconch ; columella 

 twisted. 



Type. — Puccinum liar pa, Linnaeus. 



Subgenus EOCITHARA, Fischer. 

 [Man. Conchy!. 1883, p. 601.] 



Columellar callosity more sharply defined and elevated than in 

 Harpa [sensu stricto) ; posterior prolongations of the transverse ribs 

 frequently flattened against and practically covering the suture. 

 This, together with the subgenus Silia, Mayer, includes almost all 

 fossil forms of the genus. 



Type. — Harpa mutica, Lamarck. 



