— 88 — 



distantibus, columellari albido, dilatato, reflexo, sed haud 

 incrassato, externo albido, reflexiusculo, haud incrassato 

 (an adulto?). Diam maj. 20, min. 17, alt. 12,5, diam. apert. 

 12, alt. 11 mm. 



Aufenthalt auf dem Berge Busu im Hinterland des 

 Huon-Golfes in Neuguinea, in 2600 m Höhe; gesammelt 

 von Herrn G. Keysser. 



Physa keysseri n. sp. 



Testa sinistrorsa, vix angustissime rimata vel omnino 

 exumbilieata, ovato-turrita, solidula, ruditer et irregulariter 

 striata, striis hie illic costiformibus, lutescenti-fusca, Spira 

 turrita, apice truncato-intorto ; sutura linearis. Anfractus 

 5, sat celeriter acerescentes, inferi infra suturam distincte 

 planati, ultimus altitudinis ^/a occupans, modice convexus, 

 basi subcompressus, antice haud deseendens. Apertura ovato- 

 piriformis, parum obliqua ; peristoma tenue, acutum; margo 

 columellaris leviter incrassatus, in umbilieum impressus 

 eumque omnino claudens. Alt. 16, diam. 10, alt. apert. 

 9,5 mm. 



Aufenthalt auf dem Berge Bolau im Inneren von 

 Deutsch Neu-Guinea in 3800 m Höhe in Tümpeln und 

 Lachen der Geröllregion. 



Sphaerium (Trigonosphaerium ?) alticola n. sp. 

 Concha ovato-cuneiformis, fere trigona , antice atte- 

 nuata, postice rotundata, inaequilatera, tenuis, concentrice 

 striatula, pallide cinereo-lutescens, annulo incrementi fusco 

 prope marginem sito plerumque insignis. Umbones distincti, 

 parum ante medium siti, area et areola compressae, ligamen- 

 tum tenue, breve. Cardo distinctus, normalis ; valvula dextra 

 dente mediano cum margine angulum rectum formante, 

 sinistra duobus parvis armata; dentibus lateralibus 

 lamelliformibus in valvula dextra 2 anticis et 2 posticis, 

 in sinistra. Long. 7, crass. 4 — 5 mm. 



