NATURAL SCIENCES OF PHILADELPHIA. 237 



under stones in the upper region of tlie littoral zone, at the island 

 of Tanthala. 



Nanina Kivaensis, Garr., pi. 3, fig. 71. 



Shell small, imperforate, depressl}' globose, thin, pellucid, smooth, 

 gloss}', yellowish corneous; spire rounded, apex obtuse; suture 

 margined ; whorls 5, flatly convex, slowly and regularly increasing, 

 last one rounded, not descending in front, base convex ; aperture 

 oblique, -luniform ; peristome thin, simple, columella white, cal- 

 lous, and furnished with a prominent twisted fold. 



Diam., greatest 4, height 5 mill. 



Hah. Viti Isles. (Coll. Phil. Acad. Nat. Sciences.) 



A rare species found among decayed vegetation in the mountain 

 forests of Kiva Isl. Its most obvious character is its dome-like 

 spire and strong columella fold. 



Helix (TKOcnoiORPHA) Merzianoides, Garr., pi. 3, fig. 72. 



Shell umbilicate, sub-lenticular, rather thin, sub-translucent, 

 gloss}'' beneath, chestnut-brown, mottled with radiating dashes of 

 corneous, beneath honey-j^ellow becoming brown towards the mar- 

 gin ; spire obtuse, convex ; whorls 6, slightly convex, obliquely 

 striated, regularly and slowly increasing, last one not descending 

 in front, acutely carinate on the periphery, keel whitish; base con- 

 vex ; suture slightly margined ; umbilicus moderate, perspective, 

 freely exposing the wdiorls, about one-fifth the greatest diameter 

 of the shell ; aperture diagonal, sub-rhomboid luniform ; peristome 

 acute above, and slightly thickened towards the base. 



Diam., greatest 22, height 9 mill. 



Hob. Yiti Isles. (Coll. Phil. Acad. Nat. Sciences.) 



A rare species peculiar to the island of Yanna Levu, where it 

 lives on the trunks of trees in damp forests. It is ver}'' closely 

 allied to H. Merziana^ Pfr., inhabiting the Solomon Islands? 

 That species has the outer lip sinuous, more thickened and sliglitl}' 

 declivous above. It is also banded on the lower surface, and the 

 termination of the body whorl is somewhat dilated. Above, the 

 color and markings are quite similar in the two species. 



