OF CONCHOLOGY. 199 



Shell elongate, ovate, dextral, rather dull, umbilicate, very 

 finely roughened longitudinally and indistinctly under the 

 lens striated transversely; whorls 5, convex; suture impressed ; 

 aperture elongately oval, rather small, not one-half the length 

 of the shell, dentate, rarely edentate; lip somewhat roundly 

 thickened. Chestnut or olivaceous, obscurely and very finely 

 striped longitudinally. 



Observations. — This species is quite distinct from Vanikoren- 

 sls, Quoy, to which it has been referred. It is terrestrial in 

 its habits. The shell and animal figured in Am. Expl. Ex. 

 as Vanikorensis is, we are of opinion, a Tahitian species. 



11. Partula crassilabris, Pse. 



Description. — T. globoso-ovata, crassa, parum nitida, trans- 

 versim tenui striata, umbilicata; anfr. 5, convexis, ultimo sub- 

 ventricoso ; apertura suborbicularis, verticalis, deutata ; labro 

 rotunde incrassata. Flavescente cornea, interdum rufescente 

 fulva, fascia flavescente cingulata. 



Dimensions. — Long. 14, diam. 10 mill. 



Shell globosely ovate, thick, dull, transversely finely stri- 

 ated, umbilicate; whorls 5, convex, the last somewhat ventri- 

 cose; aperture suborbicular, vertical, dentate; lip roundly 

 callous. Yellowish horn color, sometimes reddish-brown, with 

 a single yellowish band encircling the last whorl. 



Observations. — The above species corresponds with ITebe, 

 Pfr., as to shape, size and form of lip. It is a terrestrial 

 species, while Hebe is strictly arboreal. I hold it to be dis- 

 tinct. 



12. Partula rustica, Pse. 



Description. — T. abbreviate, vel elongato-ovata, parum ni-- 

 tida, umbilicata, solidiuscula; anfr. 5, piano-con vexis, ultimo 

 sub ven tricoso; apertura ovalis, dente parvulo munita; labro. 

 eequaliter rotunde calloso, parum reflexo; pallide aut intense 

 castanea, rarissime fascia fulvescente cornea cincta, interdum 

 omnino fulvescente cornea. 



Shell stoutly ovate or elongate ovate, dull, umbilicate, rather 

 thin ; whorls 5, plano-convex, the last slightly ventricose ; 

 aperture oval, with a small, indistinct tubercle within; lip 

 evenly and roundly thickened, but slightly reflected, angulate 

 at base of columella. Light or dark chestnut-brown, very 

 rarely with a faint yellowish horn color line or band, some- 

 times wholly of a yellowish horn color. 



Observations. — Terrestrial in its habits. 



