5i)(i 



tota striata ; apertura angusta, lineari ; labro recto, ejus angulo 

 producto, rotundato ; labio antice tortuoso, uniplicato. 



Shell cylindrical, posteriorly truncated, white, solid, transversely 

 entirely striated ; aperture narrow, linear ; outer lip straight, its 

 angle produced, rounded; inner lip anteriorly tortuous, with a 

 single fold. 



China Seas. Mus. Cuming. 



Sub-genus Volvula. 



120. Bulla acuminata (pi. cxxv. f. 152), Brug., Enc. 

 Meth. vol. i. p. :37G. Phil, En. t, 7. f. 18. 



B. testa minuta,, laevissima, subcylindrica, utrinque rostrata ; 

 spira occulta, superne parum attenuate ; apertura anguste lineari, 

 iid'erne perparum latiore ; columella basi obsolete uniplicata. 



Shell minute, very smooth, subcylindrical, beaked at both ends ; 

 spire concealed, above attenuated ; aperture narrowly linear, rather 

 wider below ; columella with a single obsolete plait at the base. 



Shores of Sicily. Mus. II. Adams. 



121. Bulla angustata (pi. cxxv. f. 153), Adams. 



B. testa cylindrica, utrinque rostrata, lsevi, nitida, alba, longi- 

 tudinaliter substriata; spira occulta; apertura lineari, in medio 

 angustata, superne producta, inferne dilatata ; labro in medio 

 coarctato ; labio uniplicato. 



Shell cylindrical, beaked at both ends, smooth, shining, white, 

 longitudinally substriated ; spire concealed ; aperture linear, nar- 

 rowed in the middle, produced above, ddatcd below ; outer lip 

 contracted in the middle ; inner lip with a single fold. 



Cagayan, Mindanao ; 25 fathoms. Cuming. 



122. Bulla rostrata (pi. cxxv. f. 154), Adams. 



B. testa elongato-ovali, alba, pellucida, utrinque rostrata, longi- 

 tudinaliter substriata, transversim sub lente minutissime striata ; 

 apertura angusta, lineari ; labro ajqualiter arcuato ; columella tor- 

 tuosti, uniplicata. 



Shell elongately oval, white, pellucid, beaked at both ends, 

 longitudinally substriated, transversely (under the lens) very 

 minutely striated; aperture narrow, linear ; outer lip equally 

 arched ; columella tortuous, with a single plait. 



Port Lincoln. Mus. Metcalfe. 



