them have already been given in the Proceedings of the Soci- 

 ety for November, 1851 ; they are here amplified and mostly 

 accompanied with figures. 



BULIMUS VESICALIS (PI. XIV. Fig. 1.) 



Testa tenuis, lactea, ovoidea, striatula, vix perforata ; spira brevis, anfracti- 

 bus 5, ultimo clliptico quadrantes tres longitudinis testas adequante ; apertura 

 dimidiam long, adequans, lunata ; labro simplici ; columella reflexa. 



Shell ovoid, thin, milk white, delicately and regularly striate ; 

 spire short, whorls 5, inflated, the last one more than three fourths 

 the length of the shell, nearly symmetrical in form at both extre- 

 mities ; aperture somewhat more than half the length of the shell, 

 narrow lunate ; lip simple ; columella broadly reflected over a nar- 

 row umbilical fissure ; a thin glazing of callus on left lip. 



Length an inch and a fourth ; breadth seven tenths of an inch. 



Inhabits Lower California. Maj. Rich. 



Form and size of B. apodemetes, D'Orb., which has variegated 

 colors, a broader base and larger aperture. It is somewhat like 

 B. coturniX) and more especially like B. oblalus Gould. 



BULIMUS VEGETUS (PI. XIV. Fig. 2. 



T. solidula, elongato-ovata, alba, striatula, perforata ; spira elevata, anfract. 

 sex, (sutnr& impressa) ultimo dimidiam longitudinis testae superante, tumido, 

 subgibboso ; apertura subovata ; labio subcontinuo, reflexo, faucibus stramineis. 



Shell rather solid, elongate, ovate, white, faintly striate ; spire 

 acuminate ; whorls six, convex, suture well impressed, last whorl 

 three fourths the length of the shell, tumid and somewhat gibbous 

 on the back ; aperture placed somewhat laterally, half the length of 

 the shell, suboval, its plane nearly that of the axis, extremities of 

 the lip approximate ; lip moderately reflexed at base, still less so 

 laterally, rising broadly at the columella, and standing off from the 

 body whorl ; umbilical opening large and deep, subcircular ; fauces 

 cream colored. 



Length an inch and a half ; breadth nearly one inch. 



Inhabits San Juan, Gulf of California. Lieut. Green. 



Belongs to the group with B. sordidus. Its form is like that of 



