In SJOSTEDTS Kl LUIAN0JABO MKRIJ EXPEDITION. (>. 



anguste mernbranaceo-prolongalum, marginibus callo tenuissimo concolore junctis, supero 

 modice curvato, regulariter arcuatim producto, sensim descendente, externo bene arcuato, 

 basali substriclo, columellari brevi, subrecto, rum basali angulum obtusum formante. 



Specimen maximum: diam. maj. 8, min. 6 1 /*, alt. 5; apert. lat. et alt. obliqua 5 mm. 



Animal, in alcoh. servatum, breve, parte mediana pallida pedis tripartiti excepta, 

 omnino nigrescens; lobus cervicalis pallii magnus, validus, appendix dextera speciminum 

 adultorum magna, rotundata, juniorum parva, triangularis; pes rude reticulatim sulcatus, 

 post testam paulum tantum porrectus, tergo post excavationem longam fortem triangularern 

 in carinam obtusam compressus. 



64 specimina exstant omnia in I&ilimancigaro, Kiboscho, ad altitudinem 3,000 

 -4,000 m. in summis pratis montanis prope ultimam regionem herbarum, mense Februarii, 



viventia collecta. 



Thapsia cavernicola 11. sp. 



Testa anguste nee profunde perforata, convexo-depressa, modice tenuis, pellucida, 

 stramineo-cornea, subtilHer radiatim plicata, plicis subtus fortioribus, sub lente lineis spira- 

 libus levissime undatis, in anfractibus superioribus difficillimo, in ultimo praesertimque 

 subtus bene conspicuis, creberrime striata; anfr. 5, planato-convexiusculi, sensim accre- 

 scentes, satura adnata subcanaliculata, plicata leviterque pellucido-marginata discreti, ultimus 

 extus bene rotundatus nee angulatus, subtus subplanatus et ad perforationem paulum plane 

 excavatus; apertura subobliqua, lunata; peristoma rectum, acutum, marginibus distantibus, 

 basali paulum arcuatim protracto, columellari valde obliquo leviter albido-calloso-incrassalo 

 et longiter triangulatim dilatato, superne transversim excavato, leniter reflexo et superne 

 ad sinistram angulatim producto, perforationem semitegente. 



Diam. maj. 1272; min. 11; alt. G 1 /? mm. 



Animal leviter reticulatim sulcatum; pes nigrescens, subtus tripartitus, parte media 

 pallida, supra postice cauda brevi acuta, apice pallido instructus. 



Specimina 15, quorum unicum in alcoh. servatum, in Usawhara in cavernis "Mkulu- 

 musi" dictis prope Tanga capta, perlustravi. 



Thapsia silYaeplimosae n. sp. 



Testa anguste nee pervie perforata, convexiusculo-depressa, modice tenuis, pellucida, 

 oleo-nitida, pallide stramineo-cornea, apice et regione perforationis leviter albescens, radia- 

 tim dense sat regulariter plicata, plicis subtus fortioribus, sub lente ubique spiraliter 

 densissime striata; spira parum prominuhi, apice obtuso; anfr. 4 ! /2, planato-convexiusculi, 

 sensim accrescentes, sutura albescente vix adnata nee canaliculata, dislincle pellucido- 

 marginata, plicala discreti, ultimus bene rotundatus baud angulatus; apertura obliqua, 

 rotundato-lunata; peristoma rectum, acutum, regulariter arcuatum, marginibus distantibus 

 callo lenuissimo anlrorsum curvatim terminato junctis, superiore prope insertionem et 

 basali in medio leviter arcuatim protractis, columellari pallido-incrassato, superne Iri- 

 angulatim dilatato, subadnato leviterque ad sinistram angulatim producto, perforationem 

 paulisper tegente. 



