— 185 — 

 Neue Yorderasiatiscbe Najaden. 



Von 

 Dr. W. Kobelt. 



1. TJnio thospiensis n. sp. 



Concha regulariter ovata vel postice subroslrata, valde 

 inaequilatera, utrinque rotundata, modice inflata, crassa, 

 ruditer costato-sulcala, parum nitens, in junioribus luteo- 

 fusca, postice obsolete viridi-radiata, in adultis fusca. Margo 

 compresso rotundatus, cum dorsali ascendente substricto 

 angulum vix formans, margo ventralis regulariter modice 

 arcuatbs , versus posticum convexo - descendentem vix 

 ascendens, rostrum basale vix formans. Umbones ad '/a 

 longitudinis (15 : 40) positi, tumidi, incurvi, in adultis valde 

 detriti, in junioribus rugis flexuosis parum distinctis paucis 

 sculpti. Ligamentum breve, crassum, sat altum, sinu lato 

 brevi, area distincta, medio conipressa, postice parum hians; 

 areola mediocris. Dens valvulae dextrae conicus, acutus, 

 vixdivergens ; dentes valvulae sinistrae compressi, subaequales, 

 fovea profunda discreti ; intervallum compressum , cum 

 lamellis leviter arcuatis angulum formans. Impressiones 

 distincte triplices. Margarita incrassata, alba, postice 

 rosacea; callus marginalisdistinctus, "/* longitudinis occupans. 

 Long. 55, alt. 32, crass 22 mm. 



Hab. in rivulo Mermid Tubai, lacu Wan (thospiensi) 

 Armeniae affluente, legit cl. Dr. Graeter. 



Gehört noch zur Verwandschaft des Unio stevenianus 

 Kryn., also in den Formenkreis des Unio crassus. 

 2. Unio schwarzii n. sp. 



Concha ovalis , postice acuminata , inaequilatera , 

 solidissima ponderosa, inflata, nitida, subtiliter striata, antice 

 et postice levissime squamosa, antice distincte regulariterque 

 costellata, luteo- viridis, area viridi-fusco radiata, annulis 

 incrementifnscisduobusornata, umbonibus usque adannulum 



