TAB. XII. 



Fig. 



1. Mytilus affinis, page 61. 



a, e, d. specimens from Colwell Bay. Mus. Edwards. 



b. specimen from Barton. Mus. Edwards. 



2. Mytilus strigillatus, p. 61. „ 



3. Dreissena Brardii, p. 59. 



a. view of the interior of the left valve, in which is a specimen of the arenaceous 

 case of a Sabella ? 



4. Modiola depressa, p. 63. Specimen from Highgate. Mus. Wetherell. 



5. Modiola elegans,jo. 65. 



a. var. inelegans, from Highgate. Mus. Wetherell. 



b. elegans, from Highgate. Mus. Wetherell. 



c. var. elegantior, from Hordwell. Mus. Edwards. 



6. Modiola hastata, p. 67. 



Specimens from Brook. Mus. Edwards. 



7. Modiola simplex, p. 71. 



a. specimen from Heme Bay. Mus. Edwards. 



b. „ Bognor. 



8. Modiola Nystii, p. 68. Mus. Edwards. 



9. Modiola subcarinata, p. 71. 



Specimen from Highgate. Mus. Wetherell. 



