— 43 — 



posticus multo major, conicus, acie valde crenatus, 

 anticus multo minor, compressus, angustus; intervallum 

 parum distinctum, irreguläre, cum lamellis strictis ele- 

 vatis angulum formans. Impressiones musculares anti- 

 cae et posticae profundae, anticae 1 et 2 haud separatae; 

 Margarita rosacea, antice incrassata, subtilissime granulo- 

 sa; calius marginalis parum incrassatus; impressio pallea- 

 lis distincta. 



Long. 45, alt. ad umbones 25, ad angulum post. 29, 

 crass. 21 mm. Long. 41, alt. ad umbones 27, ad angulum 

 post. 28, crass. 20 mm. 



Unio blanchianus (Letourneux in litt., Bourguignat 

 in coli.). 



Nähr el Audsche bei Jaffa. 



Unio deschampsi n. sp. Icoii. II, 2721. 

 Goncha ovalo-rotundata, antice rotundata, postice fere 

 verticaliter truncata, valde inaequilatera, parum inflata, 

 solidula sed haud crassa, irregulariter sulcato-striata, sordide 

 viridis fusca, obsolete nigro cingulata, postice obsoletissiine 

 radiata. Margo anticus depresse rotundatus, cum dorsali 

 primum depresso, dein inter umbones subito ascendente, 

 demuni horizontali angulum acutum formans, ventralis 

 regulariter arcnatus, posticus fere verticaliter truncato- 

 rotundaius. Umbones tumidi, prominentes, ad Va longiiudinis 

 siti, ruditcr concentrice sculpti, rugis angulatis, apicibus 

 acutis, antrorsum incurvatis, haud contiguis. Ligamentum 

 sat longuni, sinu brevi ; area compressa, cristis elevatis vix 

 defmita, postice hians ; areola distincta, compressri, inter 

 umbones inIrans, sinulo di^tincto, ligamentum intornum 

 moslranlc. Dens valvulac dextrao divergens, compressus, 

 acie crenalus, sulco angusto a n)argine discretus; dentes 

 valvulac sinisirae compressi, subaequales, fossa interna vix 

 discreti; intervallum brevissimum; lamellac sat longae, 

 compressae, cum cardine angulum formantes. Impressiones 



