PLATE XVII. 



Neolampas rostellata, f- 1- 12. 



1. Specimen measuring 14. 7»"' in long, diam., seen from abactinal side. 



2. Specimen measuring 14. 7""- in long, diam, seen from actiual side. 



3. Specimen measuring 14. T™- in long, diam., seen in profile. 



4. Showing tlie anal system and lube, further magnified. 



5. Showing plates composing anal system. 



6. Part of Fig. 4 in profile. 



7. Part of test to show tubercles. 



8. Part of test more enlarged. 



9. Enlarged view of actinostome. 



10. Spine. 



11. Part of ambulacral tube. 



12. Ovary, dry. 



Homolampas fragilis, f. 13- 21. 



13. From below, measuring 9.3"'°' in diam. 



14. In profile, measuring 9.3""- in diam. 



15. From above, measuring 9.3"°'- in diam. 

 IG. Magnified actinostome. 



17. Fragment of specimen, measuring IS.S"""- in diam , showing Lovenia-like spines. 



18. Part of test magnified. 



19. Anal system and subanal fasciole. 



20. Young gills adjoining actinostome. 



21. Perforated crenulated tubercle, from anterior edge of test, magnified. 



