200 AMERICAN JOURNAL 



13. Partula umbilicata, Pse. 



Description. — T. globoso-ovata, solida, parum nitida, late 

 umbilicata, juxta perforationem rotunde an gulata, trans versim 

 tenuissime striata; anfr. 4§, convexis, ultimo ventricosus ; 

 apertura rotunde ovalis, dentata ; labro intus calloso, oblique 

 piano ; columella callosa, subdentiformis, ad basi angulata. 



Fulvescente aut fuscescente cornea, longitudinaliter obscure 

 strigata, apice plerumque rufescente fusca vel purpurascente, 

 rarissime onmino intense castanea, aut fulvescente cornea cin- 

 gulata. 



Dimensions. — Long. 18, diam. 12| mill. 



Shell globosely ovate, solid, rather dull, openly umbilicate, 

 roundly angulate at the umbilicus, transversely very finely 

 striated ; whorls 4 J, convex, the last swollen ; aperture roundly 

 oval, dentate ; lip internally thickened, obliquely flat; colu- 

 mella callous, somewhat dentate, angulate at base. 



Yellowish or brownish horn color, faintly striped longitudi- 

 nally; apex usually reddish-brown or dark purple; seldom 

 wholly dark chestnut-brown ; occasionally with a broad yel- 

 lowish horn color band ; very rarely yellowish horn color, with 

 a chestnut band. 



14. Partula compacta, Pse. 



Description. — T. elongata ovata, solida, umbilicata, parum 

 nitida, transversim tenui striata ; anfr. 5, plano-convexis ; aper- 

 tura auriculata, verticalis vel subobliquis, prominente dentata, 

 ad basi angulata; labro late calloso, angulato; columella sub- 

 verticalis, incrassata. Fulvescente, interdum onmino rufes- 

 cente fusca, rarissime fascia fulvescente cingulata. 



Dimensions. — Long. 21, diam. 14J. 



Shell rather elongately ovate, solid, umbilicate, rather dull, 

 transversely finely striate; whorls 5, plano-convex ; aperture 

 'auriculate, vertical or slightly oblique, callous on its inner 

 edge, callosity not reaching the body whorl, angulate near the 

 outer edge; columella much thickened. 



Yellowish, sometimes wholly reddish-brown, and rarely with 

 a broad yellowish band. 



Ohserimtions.—The two last species are analogous forms from 

 the neighboring islands of Kaiatea and Tah'aa. They differ in 

 the form of the lip and aperture and somewhat in general 

 shape. 



