286 MELVILL : NEW SPECIES OF MITRA. 



Mitra tensa nov. sp. PI. ii, fig. 21. 



M. testa gracilis fustformt, attenuata, cornea, lo7igitudinaliter 

 costata, costis fotundis siibcompressis, Icevigata, tenuicula, 

 columella quadriplicata. 



Lon. II mill. laf. 3 '50 ;/////. 



Habitat ? 



Shell fusiform, gracefully attenuated, horn colour, ribbed 

 lengthwise, with rounded rather compressed ribs, smoothish, 

 thin, columella four-plicate. 



An Antarctic shell, of which the exact locality is unfortu- 

 nately not known, superficially resembling one of the Pleuro- 

 tomidae of the Bela or Cithara group. Probably a Volutomitra. 



Mitra abacophora nov. sp. PI. ii, fig. 22. 



M. testa oblongo-ovata, solida, spira breviuscula, obtnsa, gilva, 

 sutu7is impressis, anfractibiis sublcezngatis, leniter transverso 

 striatis, balteo albo infra siitumm cingulatis, hie illic ramu- 

 loso, infra prozsertim squarrose albi-punctatis, colu7nella 

 quadriplicata, labro Icevi, intus superne sinuato. 



Lojtg. 23 fnilL, lat. 11 mill. 



Habitat ? 



Shell oblong-ovate, solid, spire somewhat short, blunt, tan- 

 colour, sutures impressed, whorls smoothish, lightly transversely 

 striate, surrounded with a white belt beneath the suture, which 

 here and there branches out, the whorls below especially are 

 squarely white-dotted, the columella is four-plaited, the lip 

 smooth, sinuate within. 



This interesting shell is one of the subgenus Strigatella 

 (Swn.), it comes near to M. maculosa (Reeve), trisiis (Swn.), 

 and auriculoides (Reeve), diff'ering from all, however, in its larger 

 size, smooth inner lip, different colour, and disposition of 

 markings. 



Mitra rhodinosphaera nov. sp. PI. ii, fig. 23. 

 M. testa parvula, ovato-scalari, spira obtusa, longitudinaliter 



crebj-e-costata, costis magnis, intetstitiis st/iatis, punicea balteo 



albo cingulata, columella triplicata. 

 Long. 6 mill., lat. 3 tnill. 

 Hab. : Mauritius. 



J.C, v., Jan., 1888 



