72 AMERICAN JOURNAL 



Shell thin, fragile, pellucid, white or greenish, rather oblique- 

 ly oval, smooth, somewhat roughened by stride of growth, imper- 

 forate ; aperture narrow posteriorly, dilated anteriorly ; lip 

 somewhat involute ; columella callous on its lower part. 



Animal pale watery green, closely dotted with orange and 

 purple. The portion seen through the shell is spotted obscurely 

 with cream yellow, their margins powdered with white. Foot 

 cream white, remotely dotted with pale orange. Side lobes not 

 extending back over one-half of the shell. Foot regular in 

 width, rather sharply rounded behind. 



Haminea simillima, Pease. — Plate 7, fig. 3. 



Description. — T. tenui, pellucida, fragilis, alba, abbreviato- 

 ovata, laevigata, imperforata ; apertura postice angusta, antice 

 dilatata ; columella infra arcuata, callosa ; labro subinvoluto. 



Dimensions. — Long. 8, diam. 6 mill. 



Hob. — Tahiti. 



Shell thin, fragile, pellucid, white, abbreviately oval, imper- 

 forate ; aperture narrow above, dilated below; columella arched 

 anteriorly and callous ; lip slightly involute. 



Animal pale green, the portion seen through the shell darker, 

 everywhere conspicuously dotted with rich orange, with a few 

 spots of purplish interspersed. Foot cream color, with close 

 orange dots. Posterior portion of the foot narrow, extending 

 some distance beyond the shell and terminating in a sharp point. 



Remarks. — The above two species resemble each other closely 

 in both animal and shell. The latter species is much smaller 

 and differs somewhat in color, and especially in the shape of its 

 foot, which is constant. 



Haminea aperta, Pease. 



Description. — T. tenui, pellucida, ovata, imperforata, tenuis- 

 sime irregulariter, longitudinaliter striata; apertura postice an- 

 gusta, antice dilatata ; labro supra vix expanso ; columella valde 

 arcuata, callosa ; alba. 



Dimensions. — Long. 15, diam. 9 mill. 



Hab.— Tahiti. 



Shell thin, pellucid, smooth, ovate, imperforate, white, very 

 finely and irregularly striate longitudinally ; outer lip slightly 

 expanded above ; aperture narrow posteriorly, anteriorly di- 

 lated ; columella deeply arched below, and strongly callous ; 

 callosity somewhat reflexed, rather broad. 



Remarks. — Approaches H. cymbalum, Quoy, but more ovate, 

 outer lip not being so much expanded. 



