TAB. XI. 



Fig. 



1. Pisidium ammcum, pa^e 109. 



a. inside of elongated specimen 



from Stutton. 

 /j. ditto of var. sulcatum from 



Grays. 



2. Cyclas cornea, /;. 107. 



r/. outside of var. tumida. 

 6. ditto of var. compressa. 



3. Montacuta donacina, yj. 131. 



d. inside of left valve. 

 c. outside of the same. 

 a. inside of var. cylindrica. 



4. Kellia cycladia, /?. 122. 



5. Cyamium ? eximium, jo. 132. 



6. Lcpton deprcssuni, /I. llti. 



Fig. 



7. Lepton nitidum, ;». 116. 



8. Lepton squamosum, /;. 114. 



9. Lepton deltoideum, //. 115. 



c. hinge of left valve slightly 



enlarged. 



d. ditto right valve ditto. 



10. Kellia rubra, jB. 125. 



11. Anodonta cygnea, 7;. 102. 



12. Unio littoralis, 7;. 98. 



13. Unio tumidus, jO. 99. 



14. Lucinopsis Lajonkairii, />. 149. 



15. Cyrena consobrina, yO. 104. 



c. specimen of a more trigonal 

 form. 



T/ie lines indicate the size of the specimens. 



