— 181 — 



3. Gen. Uiiio Phil. 



98. Unio pictoruni L. 



99. — tumidus Nils. 



100. -• batavus Lam. 



II. Farn. Cycladidae. 



4. Gen. Sphaerium Scop. 



101. Sphaerium rivicoliim Leach. 



102. — coruenm L. 



5. Gen. Calyculina Cless. 



103. Calyculina lacnstris Müll. (= calyculata Drap.) 



6. Gen. Pisidium C. Pf. 



104 Pisidium amnicum Müll. (= obliquuni Pf.) 



105. — fossarinum Cless. (= fontinale Pf.) 



106. - obtusale C. Pf. 



107. — nitidum Jen. (von Clessin unter Pisidien aus 



Jensei aufgefunden). 



III. Farn. Dreisseiiidae. 



7. Gen. Dreissena Ben. 



108. Dreissena polyniorpha Pall, 



Diagnosen neuer Arten- 



Von 



VV. Kobelt. 



Helix (Xeroleuca) Libyca Ponsonhy mss. 

 Testa sat anguste sed pervie umbilicata , orbiculato 

 depressa, apice tantum prominulo, irregulariter stri- 

 atula et inter strias crispato-rugulosa, sutura impressa, 

 inter anfractus superos distincte crenulata, versus aper- 

 turam lineari ; cretacea, sordide albida. Anfractus 5, 

 regulariter crescentes, primi l^/g apicem prominulum 

 iaevem lacteum formantes, sequentes supra plani, 



