508 



17. Bulla pusilla (pi. cxxi. f. 30), Pfeiffer. 



B. testa parva, alba, brevi, subfusiformi ; spira subacuminata, 

 anfractibus tribus, ultimo magno, papilloso ; apertura angusta, 

 labio antice valde plicato, labio subrecto ; rima uoibilicari sub - 

 aperta. 



Shell small, white, short, subfusiform ; spire subacuminated, 

 whorls three, the last large and papillary ; aperture narrow ; colu- 

 mella with a very strong anterior fold ; outer lip rather straight ; 

 umbilical fissure rather wide. Mm. lianley. 



18. Bulla coarctata (pi. cxxi. f. 31), Adams. 



B. testa ovato-cylindrica, in medio subangustata, alba, nitida, 

 striis spiralibus, confertis, tenuissimis, undulosis sculpta; spira 

 subdepressa, anfractibus quatuor, sutura profunde canaliculata, 

 lamina spirali e callo columellari cincta ; apertura angusta, in medio 

 coarctata, infra, dilatata ; columella callosa, plica evanida ; labio 

 externo, supra rotundato, in medio subinfiexo. 



Shell ovately cylindrical, somewhat narrowed in the middle, 

 white, shining, engraved with very fine close spiral lines ; spire 

 somewhat depressed, whorls four, suture deeply channelled, en- 

 circled with a spiral lamina from the columellar callus ; aperture 

 narrow, contracted in the middle, inferiorly dilated; columella 

 callous, with an obsolete fold ; outer lip rounded above, subinflexed 

 in the middle. 



Island of Ficao ; coral sands, 6 fathoms, H. C. Mus. Cuming. 



19. Bulla planospika (pi. cxxi. f. 32), Adams. 



B. testa cylindrical, apice truncata, alba, lsevi, subpellucida, 

 longitudinahter sulcata ; spira depressa, plana, anfractibus quatuor, 

 sulcatis, radiatim striatis ; apertura angusta, antice dilatata ; colu- 

 mella callosa, uniplicata. 



Shell cylindrical, apex truncated, white, smooth, subpellucid, 

 longitudinally grooved; spire depressed, level-topped, whorls four, 

 grooved, radiately striated ; aperture narrow, anteriorly dilated ; 

 columella callous, with a single plait. 



Sorsagon, Island of Luzon, 4 fathoms, coarse sand. Cuming. 



20. Bulla biplex (pi. cxxi. f. 33), Adams. 



B. testa cylindrical, apice subtruncata, alba, solida, nitida, trans- 



