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, flexuous ; 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 

 coniertis ; 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, ovah, alba, nitida, transversim valde tota striata, 

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

 tundato ; labio antice valde tortuoso, subtruncato. 



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

 striated, striae rather wide apart; outer hp arched, posteriorly 

 produced, anteriorly rounded ; inner lip anteriorly strongly twisted, 

 subtruncated. 



Port Lincoln, Australia. Mus. Metcalfe. 



Sub-genus Cylichna. 



101. Bulla cylindracea (pi. cxxv. f. 1^2) , Pennant, Zool. 

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



Gmelin. 



B. testa cyhndrica, Isevi, alba; apertura Hneari, basin versus 

 pariim dUatata ; vertice obtuso, perforate ; striis transversis nulhs 

 (aut evanidis) ; columella callosa, uniphcata. 



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

 lated towards the base ; apex obtuse, perforated ; transverse strise 

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



British Islands. 



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

 de I'Astrolabe. 



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



