PLATE XXXVII. 



FIGS. 



1-4. Styela coriacea A. & H. (p. 109) 1. A young 

 individual, extended : natural size. 2. An 

 adult, extended : natural size. 3. The same, 

 contracted: natural size. 4.- Tubercles of the 

 test : slightly enlarged. 



5. Styela pomaria (Sav.). (p. 110) Test: natural 

 size. 



6 and 7. Styela sulcatula (Alder). (p. 113) 6. Tests, 

 extended : natural size. 7. Test, contracted : 

 natural size. 



8 and 9. Styela grnnulata (Alder). (p. 115) 8. Three 

 individuals; fully extended, partly extended, 

 and contracted : natural size. 9. Facets of 

 the test : magnified. 



10-12. Styela variabilis sp. nov. (p. 117) 10. The 

 usual form: natural size. 11. A variety: 

 natural size. 12. Mantle : slightly enlarged. 



13. (?) Styela obncura sp. nov. (p. 119) Test: natural 



size. 



14. Styela comata (Alder), (p. 120) Test: natural 



size. 



15. Styela veatita (Alder), (p. 122) Test, with the 



siphons extended : natural size. 



16 and 17. Styela riolacea (Alder), (p. 125) 16. Test, with 

 the siphons retracted : two and a half times 

 natural size. 17. The same, with the siphons 

 extended : two and a half times natural size. 

 16a represents the natural size. 



18. Styela fibrillata sp. nov. (p. 125) Test of an 

 ovate form : natural size. 



