590 



Shell small, elongately oval, posteriorly narrowed, white, shin- 

 ing, longitudinally substriated, under the lens very minutely stri- 

 ated ; aperture narrow, linear, anteriorly dilated ; outer lip pos- 

 teriorly produced, rlexuous; inner lip subcallous. 



Port Lincoln. Mus. Metcalfe. 



99. Bulla parvula (pi. cxxv. f. 130), Adams. 



B. testa, parva, ovali, alba, nitida, transversim tota striata, striis 

 confertis; labro arcuato, postice producto, antice dilatato; labio 

 vix tortuoso, subtruncato. 



Shell small, oval, white, shining, transversely entirely striated, 

 striae close together ; outer lip arched, posteriorly produced, an- 

 teriorly dilated ; inner lip slightly tortuous, subtruncated. 



Port Lincoln. Mus. Metcalfe. 



100. Bulla hordeacea (pi. cxxv. f. 131), Adams. 



B. testa parva, ovali, alba, nitida, transversim valde tota striata, 

 striis subdistantibus ; labro arcuato, postice producta, antice ro- 

 tundato ; labio antice valde tortuoso, subtruncato. 



Shell small, oval, white, shining, transversely strongly entirely 

 striated, strise rather wide apart; outer lip arched, posteriorly 

 produced, anteriorly rounded ; inner lip anteriorly strongly twisted, 

 subtruncated. 



Port Lincoln, Austraha. Mus. Metcalfe. 



Sub-genus Cylichna. 



101. Bulla cylindracea (pi. cxxv. f. 132), Pennant, Zool. 

 Brit. vol. iv. pi. 73. f. 5, 6. B. convoluta, Brocchi. B. oliva, 

 Gmelin. 



B. testa cylindrica, lsevi, alba; apertura lineari, basin versus 

 parum dilatata ; vertice obtuso, perforato ; striis transversis nulhs 

 (aut evanidis) ; columella callosa, uniplicata. 



Shell cylindrical, smooth, white ; aperture linear, slightly di- 

 lated towards the base ; apex obtuse, perforated ; transverse stria? 

 obsolete, or none ; columella callous, with a single plait. 



British Islands. 



102. Bulla arachis (pi. cxxv. f. 133, 134), Quoy, Voy. 

 de l'Astrolabe. 



B. testa solida, longo-cylindrica, transversim tenuissime striata, 



