396 Mr. Cosmo Melvill on the 



4. Peristernia hilaris sp. nov. (Fig. 6). 



P, testa subfusiformi^ fulvo-aurmttidy anfractibus septeiiiy 

 conspicue ad suturas angulatis^ longitudinaliter viulticostatisy 

 Izrzs transversim candidis arete complexis^ infra suturas dud- 

 bus^ ultimo anfractu tribuSy nionilifonnibus ; — sphcerulis cequisy 

 nitidis^ labro simpliciy aperturd subangustd, oblongd^ columella 

 plicis tribus instructd. 



Long. 19 m. 



Lat. 9 „ 



Hab. Mauritius. 



One of the most beautiful of the smaller members of 

 the genus. The ground colour is a deep orange, and the 

 clean cut and close-lying white lirae transversely cross the 

 whorls, affording a pleasing contrast. The two or three 

 lirae immediately below the sutures are decorated with 

 shining white round beads, of almost equal size, regularly 

 concentrically disposed. 



One specimen in the National Collection, South Ken- 

 sington, P. Kobeltiana (Tapp. Can.), a very beautiful form 

 from Mauritius, is a larger ally of this species. 



5. Peristernia canthariformis, sp. nov. (Fig. 12). 



P. testa graciliy elongato-fusiformi, ad basin subrecurvd, 

 anfractibus octo, longitudinaliter irregulariter costatis, liris, 

 binis transversim multicinctis^ albidd, ad costas hie illic 

 aurantio-suffusdy aperturd simplici^ columelld quadriplicatdy 

 albescente. 



Long. 31 mill. 



Lat. II „ 



Hab. Mauritius. 



A most graceful and delicate species, unlike any other 

 known to me, though slightly resembling the next to be 

 described, from which it abundantly differs in many par- 

 ticulars. The extremely attenuated and graceful form, 

 superficial character of the ribs, the delicate orange chestnut 

 colouring, impart a very lively bright appearance to the 



