588 



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

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

 anteriorly semiplicated. 



Hub. ? 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 plica dentiformi desinente. 



Shell subcylindrical, posteriorly subtruncated, anteriorly pro- 

 duced, solid, opake, longitudinally grooved ; outer lip inflexed in 

 the middle ; inner lip strongly truncated anteriorly, and ending 

 in a dentiform plate. 



Shores of Borneo. Mus. Cuming. 



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



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

 pellucida, longitudinaliter 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 nonscuipta (pi. cxxv. f. 125), Adams. 



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

 striata, postice subtruncata, antice producta ; labro subrecto; 

 labio antice valde truncato, in plica dentiformi desinente. 



Shell ovately cylindrical, white, 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), Alicula cylindrica, 

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



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

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

 non reflexo, superue uniplicato, altero fine rotundato. Animale 

 rlavicante ; scuto capitis et alarum margine lsete viridibus ; capite 

 rhomboide, subacute. 



