MOELLENDORFF : LAND SHELLS OF CAROLINE ISLANDS. 121 



I cannot ascertain whether the latter variety lives with the type or 

 forms a local race on a different part of the island. 



54.— Helieina (Sulfupina) earolinarum, n. sp. 



T. depresse globosa, tenuiuscula, subtilissime striatula, parum 

 nitens, flava, interdum taenia lata ignea ornata. Anfr. 4^ planulati, 

 sutura appressa, submarginata, disjuncti, ultimus ad peripheriam 

 confuse subangulatus. Apertura sat obliqua, rotundato-triangularis, 

 peristoma superne rectum, acutum, basi subexpansum, obtusum, 

 columella brevis, crassiuscula, callum latum, granulosum, emittens. 



Diam. 4, alt. 275 mm. 



Hah. — Ponape (Kubary). 



55.— Helieina zonata, Less. 



Lesson, Voy. Coqu. Zool., ii, i, p. 350. — Pfr., Mon. Pneum., p. 358. 

 Hah. — Ualan (Lesson). 



Probably a Pleuvopoma and perhaps identical with or nearly 

 related to H. zigzag, Pse. 



Fam. HYDROCAENIDAE. 

 56.— Georissa rufula, n. sp. 



T. rimata, ovato-conica, solidiuscula, transverse subtiliter striatula, 

 sculptura spirali, sub lente fortiori, baud discernenda, nitidiuscula, 

 rufo-fulva. Anfr. 4^ bene convexi, sutura profunde impressa disjuncti, 

 ultimus paulisper descendens. Apertura sat obliqua, ovalis, peristoma 

 simplex, rectum, obtusum, marginibus callo validiusculo junctis, 

 columella reflexa, valde dilatata, late appressa. 



Diam. i'5, alt, 2'i mm. 



Hah. — Ponape (Etscheid). 



These lists are naturally very incomplete and if Ponape appears to 

 possess a much richer fauna than the rest of the islands, the reason 

 is certainly not only its greater size and the higher altitude of its hills, 

 but chiefly the fact that it has been better explored than the other 

 atolls. I am convinced that even Ponape will still yield a number of 

 additional species, when a thorough investigation of the hills has been 

 made. My lamented friend Kubary had only just begun to collect 

 in the higher regions when he died. It seems to me that it is too 

 early yet to base geographical conclusions on the scant material now 

 at our disposal. It will be useful, however, to give a comparative 

 list of the species hitherto known from the three groups of Micronesia. 



