28 



Succinea put amen. Testa magna, depressa, globoso-elliptica, 

 tenuis, leevis, striis incrementalibus et striis volventibus tenuiter 

 decussata, fulvo-cornea, ad peripheriam sub-angu!ata : spira fere 

 nulla, anfr. vix 2 : sutura linearis : apertura paginam inferiorem 

 fere adequans, rotundato-ovalis ; margine columellari sub-plicato. 

 Long. |, lat. ^ poll. Hob. Upolu. 



A remarkable shell, resembling the half of a bird's egg. Dis- 

 tinguished from S. rotundata by its larger size, revolving striae, 

 and angular periphery. 



Succinea vesicalis. Testa tenuissima, fragilis, lucida, late 

 ovata, depressa, gradibus astatis undulata, epidermide straminea 

 induta : spira anfr. 3, ultimo magno, patulo, alteris spiram par- 

 vam formantibus : apertura subovalis, ad basim late rotundata, 

 longitudinis f- equans ; plica columellari conspicua. Long. -j%, 

 lat. | ; alt. § poll. Hub. Mauna Kea, Hawaii. 



About the shape and size of S. rubes cens. A delicate, very 

 ample species. 



Succinea lumbalis. Testa mediocris, ovato-conica, tenuis- 

 sima, sublucida, pallide virens, leviter striata, subtus gibbosa : 

 spira acute conica ; anfr. 3 convexiusculis, ultimo ventricoso, 

 versus suturam declivi : apertura rotundato-ovata ; columella 

 valde arcuata, callo induta ; plica mediocri. Long. ^, lat. 2 5 <j-, 

 alt. /jy poll. Hob. Kauai, Sandwich Islands. 



Its dull aspect, conical spire and ventricose form are its dis- 

 tinctive marks. It resembles small specimens of Limnea catas- 

 cojmtm, Say. 



Succinea humerosa. Testa ovata, depressa, sub-rhombea, 

 sublucida, striis incrementalibus rugosa, sulcis raris volventibus 

 interdum arata, dilute virens, et interdum rubricans : spira anfr. 

 3, ultimo permagno, postice sub-angulato : apertura sub-ovalis, 

 postice amplificata ; labro dextrorsum decurrente ; plica columel- 

 lari conspicua. Long. }, lat. f, alt. ■£ poll. Hab. Mountains of 

 Taheiti. 



About the size of S. amphibia, and has a peculiarly broad 

 aperture on account of the outward sweep of the posterior por- 

 tion of the lip, and may be known by the angular shoulder on 

 the last whorl. 



