27 



rotundata, apice subcentrali, anfr. 3, convexis, declinantibus ; su- 

 tura excavata : apertura sub-circularis ; labro antrorsum arcuata. 

 Diam. -J, alt. r \ poll. Hab. Kauai, Sandwich Islands. 



It is larger than V. pellucida, more opaque, and the aperture 

 is larger. 



Vitkina robusta. Testa helicoidea, transversa, depresso-glo- 

 bosa, sub-valida, polita, perlucida, dilute flavo-viridis, lineis in- 

 crementalibus regularibus, obtusis, striata : spira obtusa, anfr. 

 3, ultimo magno ; apice subcentrali ; subtus rotundata : apertura 

 rotundata ; margine sinistro superne reflexo, rimam umbilica- 

 lem parvum formante. Diam. max. ^, alt. £ poll. Hab. New 

 South Wales. 



This is about the size and form of V. nigra, Quoy, and is 

 almost exactly like V. Freyci?ieti, Fer. It is more globose and 

 brilliant than V. marcida, and seems to be built more firmly than 

 any other species. 



Succinea rotundata. Testa parva, tenera, sub-opaca, hemi- 

 spherica, flavo-virens, concinne striata : spira fere nulla, intus 

 aperta, anfr. 2^-, ultimo amplissimo : apertura circularis, postice 

 angulata, testam fere adequans ; margine columellari obliquo, 

 subrecto, conspicue plicato, et callo lato induto. Long. y 4 ^, lat. ^j, 

 alt. ^y poll. Hab. Mountains of Oahu, Sandwich Islands. 



This, with the two following species, are remarkable for their 

 hemispherical form and large apertures, with the animal much 

 too large for the shell, and belong to Helicolimax, Fer. Resem- 

 bles S. aperta, Lea. 



Succinea cepulla. Testa parva, tenuissima, pellucida, nitida, 

 succineo-virens, rotundato-elliptica, depressa, sinistrorsum rotun- 

 data, dextrorsum declivis, longitudinaliter striata et liris inequali- 

 bus volventibus arata : spira fere nulla, anfr. 2J- : apertura am- 

 plissima, ovalis, ad basim late rotundata, ad colurnellam arcuata, 

 leviter plicata ; intus me tallica. Long. ^-, lat. /^-, alt. •§■ poll. 

 Hab. Hawaii. 



Depressed and without spire like the preceding, but is larger, 

 more transparent, less spherical, has spiral furrows, and the 

 aperture is peculiarly widened posteriorly by an outward sweep 

 of the lip. 



