224 



feme glabrata, umbilico lato, profundo, infundibuliformi perforata : 

 anfr. 4£ ; suturti impressa : apertura rotundata ; labro sirnplici. Illa- 

 warra, New Soutb Wales. Drayton. 



Its lower face is like that of H. olivetorum, but the shell is more 

 delicate, and the upper surface ridged with elevated lines, many of 

 which bifurcate. [PfeifFer doubts its being Nanina, on account of its 

 umbilication.] 



Helix [Callicochlias] intaminata. T. depresso-globosa, imper- 

 forata, tenuis, translucida, alba, epidermide tenuissima straminea 

 induta : spira depressa ; anfr. 4 convexiusculis, ultimo subangulato : 

 apertura rotundata, ampla ; columella planulata, acuta ; labro everso. 

 Diam. 1 ; axis § poll. From a tree, Island of Mangsi, Straits of 

 Balabac. 



Allied to H. Valenciennesii and Broderipii, but on the whole PfeifFer 

 accords with me that it is not to be united with any other species. 



Helix spirillus. T. parva, planorboidea, tenuis, diaphana, 

 lasvis, virescens : spira depressa, anfr. 5 convexiusculis arete volutatis, 

 ad peripheriam rotundatis ; sutura impressa : apertura subcircularis ; 

 labro albo, reflexiusculo ; columella callo subdentato munita. Diam. 

 ^ ; axis, -^ poll. From the mountains beyond the valley of Aman- 

 caes, near Lima, under stones. Coutliouy. 



A miniature of H. concava, Say, having a peculiar protrusion of 

 the lip, which is white and a little thickened. It may possibly be 

 H. irochilionidcs, D'Orb. 



Helix calculosa. T. parvula, hyalina, fragilis, nitida, laevigata, 

 cornea, globoso-pyramidalis : spira depressa, anfr. 4 convexiusculis, 

 ad peripheriam angulata et tenuissime carinata ; infra convexa, 

 regione umbilicali impressa sed imperforata : apertura lunata ; labro 

 sirnplici, margine interna rotundata. Diam. -jL ; axis, T ^ poll. In- 

 habits Tahiti. Coutliouy. 



Like H. chersina Say, but has an angular periphery, though it is 

 less angular than H. subtilissima. 



Cingula [Paludestrina] Peteningensis. T. minuta, sub-per- 

 forata, elongato-conica, tenuis, levis, cinereo-viridis ; anfr. 6 convexis ; 

 sutura profunda : apertura lunata, i longitud. testa? adequans, antror- 

 sum sub-producta ; labiis postice interruptis. Long. J ; diam. -J^ 

 poll. 



Found adhering to plants in brackish water, Lagoa de Peteninga, 

 Rio Janeii'o. Coutliouy. 



Allied to C. minuta Say. It is different from any of the small 

 species figured by D'Orbigny. 



Gen. Pelex [is gen. Latia Gray, 1849]. 



P. lateralis [is L. neritoides Gray, probably]. 



