588 



cent, transversely striated at both ends ; outer lip thickened with- 

 in, posteriorly twisted, with a single plait ; inner lip reflexed, 

 anteriorly semiplicated. 



Hah. ? Mus. Metcalfe. 



92. Bulla, monodonta (pi. cxxv. f. 123), Adams. 



B. testa subcylindrica, postice subtruncata, antice producta, 

 solida, opaca, longitudinaliter sulcata ; labro in medio inflexo ; 

 labio antice valde truncato, in phca dentiformi desinente. 



Shell subcylindrical, posteriorly subtruncated, anteriorly pro- 

 duced, soUd, opake, longitudinally grooved ; outer hp inflexed in 

 the middle ; inner Hp strongly truncated anteriorly, and ending 

 in a dentiform plate. 



Shores of Borneo. Mns. Cuming. 



93. Bulla, dentifera (pi. cxxv. f. 124), Adams. 



B. testa ovoidea, postice subtruncata, antice producta, cornea, 

 pellucida, longitudinaKter sulcata ; labro simplici, acuto ; labio 

 antice valde truncato, in plica dentiformi desinente. 



Shell ovoid, posteriorly subtruncated, anteriorly produced, horny, 

 pellucid, longitudinally sulcated; outer lip simple, acute; inner 

 lip anteriorly strongly truncated, ending in a dentiform plate. 



Lord Hood's Island ; found on Avicula margaritifera. Cuming. 

 Mus. Cuming. 



94. Bulla nonscripta (pi. cxxv. f. 125), Adams. 



B. testa ovato-cylindrica, alba, subpellucida, longitudinaKter 

 striata, postice subtruncata, antice producta ; labro subrecto ; 

 labio antice valde truncato, in pHca dentiformi desinente. 



Shell ovately cylindrical, wliite, subpellucid, longitudinally 

 striated, posteriorly subtruncated, anteriorly produced ; outer lip 

 rather straight; inner lip anteriorly strongly truncated, ending 

 in a tooth-like plait. 



95. Bulla Alicula (pi. cxxv. f. 126), Ahcula cyhndrica, 

 Ehrenherg, Symb. Phys. t. 4. f. 6. 



B. testa semipollicari, subcyhndrica, tenui, antico et postico 

 fine transverse striata, hyahna ; solea exusta, alba ; labro medio 

 non reflexo, superne uniplicato, altero fine rotundato. Animale 

 flavicante ; scuto capitis et alarum margine Isete viridibus ; capite 

 rhomboide, subacute. 



