TAB. XI. 



Fig. 



1. Rissoa striata, jivr/^r' 100. 



a. front view. 



b. back view. 



2. Paludestrina subiimbilicata, yv. 108. 



a. front view. 

 h. back view. 



3. Rissoa vitrea, />». 102 



a. front view. 



b. back view. 



4. Rissoa punctura (?),/;. 103. 



a. front view. 



b. back view. 



5. Rissoa reticulata (?),yA 103. 



a. front view. 



b. back view. 



6. Rissoa confinis, jo. 104. 



a. front view. 

 (5. back view. 



Fig. 



7. Rissoa Zetlandica, 7;. 101. 



a. front view. 



b. back view. 



8. Rissoa supracostata, />!. 107. 



a. front view. 



9. Rissoa pulchella (?), 77. 104. 



a. front view. 



b. back view. 



10. Rissoa semicostata,/;. 102. 



11. Rissoa obsoleta, jy. 105. 



a. front view. 



b. back view. 



12. Rissoa costulata, /I. 106. 



a. front view, var. a. 



b. front view, var. /3. 



13. Rissoa crassi-striata, yy. 106. 



b, front view. 

 «. back view. 



The lines indicate the size of the specimens. 



