PLATE XXXIX. 



Fios. 



1. A Styela, undescribed. Mantle : six times natural 



size. 



2 and 3. Styela coriacea A. & H. (p. 109) Views of mantle : 

 twice natural size. 2. Left side. 3. Under 

 side (?). 

 4. Styela pomaria (Sav.). (p. 110) Mantle, left side : 



three times natural size. 



5 and 6. Styela granulata (Alder), (p. 115) Mantle: four 

 times natural size. 5. Rig-lit side. 6. Leftside. 



7. Styela humilis sp. nov. (p. 116) Test: one and a 



half natural size. 



8. Styela comata (Alder), (p. 120) Mantle : one and 



a half natural size. 



9. Styela vestita (Alder). (p. 125) Mantle: twice 



natural size. 



10-12. Styelaviolacea (Alder), (p. 125) Views of mantle : 

 four times natural size. 10. As seen from above. 

 11. Left side. 12. As seen from below. 



13-16. Styela depressa sp. nov. (p. 126) 13. Test, as 

 seen from above, with the siphons retracted : three 

 times natural size. 14. Portion of test, with the 

 siphons extended : further enlarged. 15 and 16. 

 Views of mantle : five times natural size (15, right 

 side ; 16, left side). 



17. Styela northumbrica sp. nov. (p. 127) Test, invest- 

 ing portion of shell of Modiola vulgaris : one and 

 a half natural size. 



