26 AMERICAN JOURNAL 



DESCRIPTIONS OF NEW SPECIES OF LAND SHELLS. 



BY W. HARPER PEASE. 



Partula expansa, Pse. Plate 9, fig. 3. 



T. solidiuscula, late umbilicata, oblique ovata, striis incre- 

 mentis subrugosula, n<m striolata, albescente, sublente lineis in- 

 terrupts, albis, cingulata, (probabiliter epidermide induta) ; 

 Spira brevis, parva; anfr. 4, convexis, ultirnus magnus, tumidus, 

 oblique valde productus, § longitudinis testae sequans ; perist. 

 aequaliter late expansum, superne marginibus approximatis; colu- 

 mella vix dilatata ; apertura obliqua, ovalis, basi rotundata. 



Alt. 14J, diam. 17J mill. ; ap. 7i mill, longa, 5 mill. lata. 

 Hab. in Insula Tutuila. 



The above peculiar species is of a type new to the genus. 

 The shell is rather solid, openly umbilicate, more so than any of 

 the genus, without the usual transverse striae, but slightly rough- 

 ened by lines of growth ; color whitish, and encircled by inter- 

 rupted opaque white lines. When living it was probably covered 

 with an epidermis. The spire is small, the last whorl comprising 

 most of the shell, which is swollen and very much produced ob- 

 liquely, so much so that the diameter is greater than its altitude. 

 The peristome is equally and widely expanded all around, the 

 margins approaching each other at the whorl, so that the aperture 

 is slightly the broadest anteriorly. 



It was collected at the above locality, by Mr. John Brazier. 



Partula bicolor, Pse. Plate 9, fig. 4. 



T. solida, perforata, acute ovata, nitida, striis confertis, ob- 

 soletis transversim notata, straminea, anfr. spine fascia rufescente 

 juxta suturam cingulatis ; perist. extus intusque rufescente; 

 anfr. 4, convexis, ultimus h longitudinis testae asquans ; perist 

 incrassatum, breviter et aequaliter expansum ; apertura vix ob- 

 liqua, ovalis, callo parvulo profundo in ventre anfr. penultimi. 



Alt. 15, diam. 9 mill., ap. 5 mill, longa, 4 mill. lata. Hab. 

 in Insula Guam. 



