PLATE XLYIII. 



The Branchial Tubercle. 



FIG. 



1. Molgnla conchilega Miill. (p. 38) 



2. M. socialis Alder, (p. 58) 



3. M. citrlna A. & H. (p. 63) 



4. Cynthia claudicans Sav. (p. 80) 



5. C. squamulosa Alder, (p. 83) 



6. C. morns Forbes, (p. 88) 



7. C. tessellata Forbes, (p. 91) 



8. C. echinata (Linn.) Alder, (p. 96) 



9. Styela tuberosa (Macg.). (p. 99) 



10. 8. pomaria (Sav.). (p. Ill) 



11. S.sulcatula (Alder), (p. 114) 



12. 8. granulata (Alder). 



13. 8. humilis sp. nov. (p. 117) 



14. 8. variabilis sp. nov. 



15. 8. obscura sp. nov. 



16. 8. comata (Alder). 



17. 8. cestita (Alder). 



18. Pelonaia corrugata Forb. & Goods, (p. 141) 



The tubercles are described on the pages referred to. 

 The figures are magnified in various proportions. 



