PLATE XII. 



Fig. 



1, la. Patella rugosa, p. 89, variety with large costse. 



lb. — — magnified portion of the surface of figs. 1, la. 



\c, Id. — — variety with fine costae. 



le. — — magnified portion of the surface of figs, le, Id. 



\f, Ig. — — ■ the young shell. 



2, 2a. Patella paradoxa, p. 90. 



2b. — — magnified portion of the surface. 



3, 3a. Patella sulcata, p. 90. 



35. — — magnified portion of the surface. 



4, 4a, c, d. Patella cingulata, p. 88. 



43. — — magnified portion of the surface. 



5, 5a. Patella striatula, p. 91. 



5/5. — — magnified portion of the surface. 



6, 6a. Patella Roemeri,j». 91. 



6b. — — magnified portion of the surface. 



7, la. Patella Aubentonensis, p. 91. 



lb. — — magnified portion of the surface. 



1c, Id. — — the young shell. 



8, 8a. Patella araehnoidea, p. 92. 



8b. — — portion of the surface magnified. 



9, da. Patella suprajurensis, p. 92. 

 10, 10a. Patella nana, p. 93. 

 11,11a. Patella inornata, p. 93. 



12. Umbrella? Hamptonensis, p. 95. 



12a. — — the surface magnified three times. 



13, 13a. Deslongchampsia Eugenei, p. 94, magnified twice. 





