SMITH : NEW LAND SHELLS FROM SOCOTRA. 35 



3. Buliminus (Passamaiella) bentii,, n. sp., 

 (PI. v., fig. 3).' 



Testa ivregnlavitcv ovata, sitpeme acuminata, alhida ?, vel fiiscescens, 

 rimata, spiva convexi conoidea, ad apicem obtuse mammillata ; anfvactns 

 5 subcelevitcv accvescentas, snperioves duo convexi, laevcs, sequentcs duo 

 minus convexi, perohliqiie striati, uUimuspostice oblique descendens,sed prope 

 labrum subascendens, pone labri medium et infva rimavi mnhilicalem valde 

 impress us ; apevtuva ivvegnlavis, obliqua, auriformis, contracta; peristoma 

 paulo incrassatum, anguste expansum ct reflexnm, viavginibus callo con- 

 spicuo recto sed obliquo fere Junctis, extcrno intus in medio bituherculato 

 et columellari plica valida elongata oblique intrante instvucto. 



Longit. 18.5, diam. 10 mm. 



The only two specimens collected by Mr. and Mrs. Bent are in 

 a bleached condition, exhibiting traces of a horny or brownish 

 colour only towards the apex. The form of this very interesting 

 species is very remarkable and at once distinguishes it from the 

 other allied species. The great contraction of the aperture is 

 very peculiar, it is also remarkable in that the parietal callus 

 does not actually join the extremities of the peristome, but is 

 separated both above and below by a slight notch or channel. 

 It is a melancholy pleasure that one feels in associating this very 

 curious species with the name of the late Mr. Bent. 



4. Buliminus (Passamaiella) rotundus, n. sp., 

 (PL v., fig. 4). 



Testa globosus, supernc conoidea, inferne excavata, vix rimata, 

 albida ; spiya brevitev conoidea, ad apicem submammillata ; anfractus 

 5^ lente accrescentes, sutura mediocriter profunda sefuncti, duo superiores 

 convexi, laeves, sequentes minus convexi, oblique tenuissime et confertim 

 costulati, ultimus globosus, antice hand descendens, in regione umbilici 

 excavatus, et circa excavationem antice obtuse carinatus, pone labrum 

 profunde scrobiculatus ; apertura irregulariter auriformis, contracta ; 

 peristoma album, tenue, marginibus callo conspicuo utrinque fere junctis, 

 extevno in medio intus pvojecto et bituberculato, columellari reflexo, plica 

 gracile intrante instructo, ad insertionem canaliculato. 



Longit. 13, diam. 11 ,5 mm. 



Remarkable for its globular form, the fine costulation being 

 finer than in B.passamaianus, the contracted, denticulate aperture, 

 &c. The parietal callus is separated from the extremities of the 

 peristome, both above and below, by a narrow groove or 

 channel. 



