— 40 — 



strictus , vei'ticaliter in impicssionen anticam abiens. 

 Intervallum vix conspicuum, cum lamellis strictis angulum 

 formans. Latus internum niargarita rosaceo-lutescente 

 indutum, callns marginalis paium incrassatus, linea pallealis 

 distincfa. Long. 54, alt. (ad umbones) 33, crass. cca. 23 mm. 

 Kuweik bei Aleppo. 



Vnio (Rh.) babensis. — Icon. II. 2713. 



C. subirregulariter elonguto-ovata, valde inaequilatcra, 

 solida, crassa, sat tumida, nigro-fusca, riiditer irregularitcr 

 costato-sulcata, versus oras plus minusve lamellosa, margo 

 anterior compresso-rotundatus, dorsalis ante umbones nullus, 

 pone umbones horizontalis, quam in ü. Simonis longior, 

 ventralis ei fere parallelus vel postice levissime impressus, 

 dein abrupte ascendens et cum postico biangulato rostrum 

 haud attcnuatum formans. Umbones magni, tumidi, sed 

 parum prominentes, apicibus detritis, vestigia rugarum 

 tantum exhibentibus ; areola parum distincta, compressa; 

 area perdistincla cristis umbonalibus decurrentibus defmita, 

 compressa, lamellose sculpta ; ligam. elongatum, sat gracile, 

 semiobtectum , sinu mediocri , dein hians. — Gardo ei 

 U. Simonis similis ; dens valv. dextrae sulco profundo antice 

 parum dilatatO; postice foveam latam perprofundam formante 

 a margine discretus et ab eo divergens, quadrangularis, 

 supra coinpressus et valde crenatus; dentes valv. sinistrae 

 conici, subaequales fovea profunda Iriangulari laterali discreti, 

 posticus Lricuspidatus ; intervallum breve, oblique costatum, 

 cum lamellis leviter curvatis angulum distinctum formans. 

 — Marg. lutescenti-rosacea; callus marginalis fere totum 

 marginem occupans, sulcus pallealis distinctus. — L. 60, alt. 

 40, crass. 28 mm. 



Oase Bab zwischen Aleppo und Membidscli. 



Unio graeteri n. — Icon. II. 2714. 

 C. fere regulariter elongato-ovata, antice leviter tantum 

 attenuata, valde inaequilatcra, parum inflata, crassa, solida» 



