TAB. XIII. 



Fig. 

 1. Modiola semi-nuda, page 70. Mus. Edwards. 



2. 



i> 



dorsata, /?. 65. Mus. Prestwich. 



3. 



>) 



tenuistriata, p. 73. Mus. Edwards. 



4. 



?j 



pygmoea,/;. 70. 



5. 



>> 



dimidiata, p. 64. ,, 



0. 



>) 



eximia, jy. 66. ,, 



7. 



5 J 



Prestwicbii, p. 69. ,, 



8. 



») 



nodulifera, p. 63. „ 



9. 



)) 



flabellula, p. 67. ,, 



10. 



>} 



Mitchelli, jo. 68. Mus. Morris. 



11 



>) 



sulcata,/*. 72. Mus. Edwards. 



12. 



»» 



? tubicola, p. 73. Mus. Jermyn Street. 



13. 



■>> 



undulata,jy. 74. Mus. Geol. Soc. 

 b. an imaginary specimen. 



14 



)) 



Deshayesii, p. 64. 



15 



J» 



dimidiata? (cast of),/?. 64. Mus. Brit. 

 The lines denote the size of the specimens 



