458 MR. HARPER PEASE ON POLYNESIAN LAND SHELLS. [Ma}' 2, 



Long. 12, diam. 6^ mill. Apert. long. 5, diam. 3i mill. 



Hab. Guadalcanal 1 , insul. Solomon. 



This delicate little species was collected at the above locality by 

 John Brazier, Esq. 



It is the nearest allied to P. minuta, Pfr. It differs in being more 

 slender, thinner, the spire elongate, the aperture smaller, the surface 

 more distinctly grauulose, and the suture marginate. 



Partula faba, var. subangulata, Pse. 



T. anguste perforata, dextrorsa, conico- interdum abbreviato-ovata, 

 solida, Icevigata, striis increment! notata, rufescentifusca, juxta 

 suturam fascia flavescente cingulata, vel flavescente, fascia fusca 

 ad suturam, interdum omnino straminea aut jiavescente uut rufes- 

 centi-fusca ; anfr. 6, convexi, ad suturam subangulati, ultimus 

 plerumque lumidiusculus ; columella superne tuberculato-callosa, 

 late dilatata; perist. intus callosum, late expansum, margine 

 dextro tuber culato-calloso, superne sinuato, fuscum, callo albido ; 

 apertura oblongo-ovalis, subauriformis . 



Alt. 28, diam. 15 mill. 



Sab. Insula Tahaa. 



The metropolis of P.faba, Mart., is on the island of Raiatea ; on 

 the adjoining island, Tahaa, it occurs in a modified form, which we 

 distinguish by the above name. 



Subfamily Succineinje, H. & A. Adams. 



Previously to the publication of the report of the American Ex- 

 ploring Expedition but three species of Succinea were known as 

 inhabiting Polynesia. At the present time it may rank as the me- 

 tropolis of the family, not only as regards the number of its species 

 but also types. The number will be much increased, that of the 

 Hawaiian Islands at least four-fold. 



It is impossible to define their generic, much more their specific 

 limits, without a knowledge of the animals. However closely the 

 shells inhabiting distant provinces may resemble each other, it will 

 eventually appear that the genera in this family are as local in their 

 distribution as those of the Helicterince. 



The animal of Succinea picta, Pi'r., inhabiting St. Helena, given 

 by H. and A. Adams as the type, differs certainly from the Euro- 

 pean genus. 



It is also doubtful whether any species of the genus Helisiga in- 

 habits Polynesia. I have met with no animal corresponding to the 

 original type of that genus. I would note that the character given 

 to the Hawaiian species arranged under the above genus by H. and 

 A. Adams, viz. "the mantle-margin covering the outer lip," I have 

 not observed, nor does it appear on the figures in the Report of 

 the American Exploring Expedition. 



I class for the present all the Polynesian species under the genus 

 Succinea, with the exception of two forms at either extreme of the 

 familv : the one, Caiinella, has been heretofore classed with Oma- 



