334 APPENDIX. 



lineations on the inner margin ; throat coated with bluish white enamel ; pillar flattened i 

 white. Operculum patelliforrn, ivory-like, the outer convex surface marbled black and white ; 

 the inner surface black. 



Length one-fourth of an inch ; diameter one-fifth of an inch. 



Locality. Found at San Diego by Mr. Blake, and also by Dr. Webb. 



This pretty little shell is usually more or less coated with cretaceous matters, but when cleaned 

 exhibits a beautifully lineated surface, peculiar on account of the lines running so nearly in the 

 ordinary direction of revolving strire. The coloration, however, sometimes consists of olive and 

 white tessellations and blotches. It would accord pretty well with P. perforata, Philippi, did it 

 not lack the distinguishing mark of that species, its perforation. 



BULLA (TORN ATI NA) INCULTA, Gould. 

 [Preliminary Report, 1855.] 



Testa minuta, solidula, eburnea, elongato-ovalis, longitudinaliter minutissime striata : spira 

 elevata ; anfractibus quatuor tabulatis : apertura linearis, octantes septem longitudinis testse 

 adequans, antice dilatata, postice rotundata ; labro incurvato ; columella satis arcuata, callosa, 

 uniplicata. PI. XI, figures 27, 28. 



Shell minute, solid, ivory white, elongated-oval, minutely striated longitudinally ; spire ele- 

 vated, consisting of about four tabulated whorls. Aperture about seven-eighths the length of 

 the shell, not attaining the end of the outer whorl, linear, constricted at the middle and some- 

 what dilated anteriorly, posterior angle rounded ; pillar moderately arcuate, usually presenting 

 a well-marked fold at the anterior fourth, and well coated with enamel. 



Length one-eighth ; breadth one-twelfth of an inch. 



Locality. San Diego. 



May be best compared with B. fusiformis, A. Adams, and is also very closely allied to B. 

 obstricla. Gould. The spire varies much in elevation, sometimes, indeed, being on a level with 

 the outer whorl. The form of the whole shell is also more or less cylindrical. 



BULLA (HAMINEA) VESICULA, Gould. 

 [Preliminary Report, 1855.] 



Testa parva, fragilis, ovato-globosa, pallide citrina, postice truncata : apertura spiram 

 superans, longitudine duplo adequans, antice et postice bene rotundata ; columella profunde 

 arcuata, vix callosa. PI. XI, fig. 29. 



Shell small, fragile, ovate globose, pale greenish yellow ; body of the shell small, truncate at 

 summit; outer whorl large ; aperture about twice the length of the body of the shell, and pro- 

 jecting above it, broadly rounded both posteriorly and anteriorly ; outer lip inflexed at the 

 middle ; pillar profoundly arcuate, with a narrow delicate callus. 



Length three-tenths ; breadth one-fifth of an inch. 



Locality. Brought from San Diego by Mr. Blake. 



It has about the size and general appearance of B. rotunda, A. Adams, but has not so large 

 a body, and is more open anteriorly ; in this Litter respect it is more like B. Nalalensis, a much 

 larger shell. 



CARDIUM CRUENTATUM, Gould. 

 [Preliminary Report, 1855.] 



Testa parva, tenuis, transversim rotundato-ovata, ventricosa, inequilateralis, polita, straminea, 



