593 



bilicated, deeply perforated, peromphalus solid, white ; outer lip 

 a little receding ; columella callous, fold distinct ; either nude and 

 shining, or covered with a fuscous epidermis. 



Scandinavia. Cagayan ; 25 fathoms, sandy mud, H. C. Mus. 

 Cuming. 



110. Bulla concinna (pi. cxxv. f. 142), Adams. 



B. testa ovato-cylindracea, inferne subacuminata, alba, nitida, 

 opaca, transversiin spirahter minutissime striata ; apice profundo, 

 umbilicato ; apertura lineari, infra parum dilatata ; columella vix 

 sinuosa, plica evanida ; labro producto, apicem desinente. 



Shell ovately cylindrical, below somewhat acuminate, white, 

 shining, opake, very minutely transversely spirally striated ; apex 

 deeply umbilicated ; aperture linear, a little dilated below ; colu- 

 mella slightly sinuous, plait obsolete ; outer lip produced, extend- 

 ing beyond the apex. 



Manila ; 3 fathoms, sandy mud. Cuming. 



111. Bulla biplicata (pi. cxxv. f. 143), Adams. 



B. testa cylindracea, gracili, postice subrotundata, striis spirali- 

 bus distantioribus sculpta ; apice profundi umbdicato ; apertura 

 angusta, lineari, supra products, infra dilatata; columella cal- 

 losa, biplicata ; epidermide subfusca tenue tecta. 



Shell cylindrical, slender, posteriorly somewhat rounded, en- 

 graved with rather distant spiral stria? ; apex deeply umbilicated ; 

 aperture narrow, linear, produced above, ddated below ; columella 

 callous, with two plaits ; covered with a reddish-brown epidermis. 



China Sea. Mus. Cuming. 



112. Bulla breyissima (pi. cxxv. f. 144), Adams. 



B. testa ovato-cylindrica, in medio parum obstricta, transversim 

 spirahter striata ; apice umbilicato, umbilico callo columellari sub- 

 obtecto; apertura angusta, hneari, in medio coarctata, superne 

 producta, inferne dilatata ; columella reflexa, subcallosa. 



Shell ovately cylindrical, a little contracted in the middle, trans- 

 versely spirally striated ; apex umbilicated, umbilicus partly 

 covered by the columellar callus ; aperture narrow, linear, con- 

 tracted in the middle, above produced, below dilated ; columella 

 reflexed, rather callous. 



China Sea. Mus. Cuming. 



