EXPLANATION OP PLATES. 129 



Fig. 9. Spine from test of Cynthia villosa, Stimps., from Puget Sound. 



Fig. 10. Spine from test of Cynthia echinata, L., from British seas. 



Fig. 11. Tentacle of C. spinifera. 



Fig. 12. Same in lateral view. 



Fig 13. Cynthia crinitistellata, n. sp., nat. size. 



PLATE CYN. XI. 



Fig. 1. Cynthia cataphracta, n. sp., between two specimens of Styela 



personata, n. sp., nat. size. 



Fig. 2. Small specimen of Cynthia cataphracta, nat. size. 

 Fig. 3. Thin section of surface layer of test, showing globular spicules 



in situ. S. 1. 



Fig. 4. Isolated spicules, showing development. S. J. 

 Fig. 5. Small part of branchial sac from inside. S. 1. 

 Fig. 6. Dorsal tubercle, tentacle, and dorsal languets, enlarged with 



lens. 



Fig. 7. Partial diaphragm at base of atrial siphon. 

 Fig. 8. Cynthia crinitistellata, n. sp., dorsal languets. S. 1. 

 Fig. 9. Part of branchial sac of same species. S. 1. 

 Fig. 10. Surface view of test of same species, showing the stellate 



hairs. S. 1. 



PLATE CYN. XII. 



Fig. 1. Styela pinguis, n. sp., nat. size. 



Fig. 2. Other specimens of same species, nat. size. 



Fig. 3. Section of test, showing vessels, &c. S. 1. 



Fig. 4. Spines on test in branchial siphon. S. ^. 



Fig. 5. Part of branchial sac. S. 1. 



Fig. 6. Part of dorsal lamina. S. 1. 



Fig. 7. Dorsal tubercle, enlarged with lens. 



Fig. 8. The alimentary canal, nat. size. 



Fig. 9. The gonads on the right side, nat. size. 



Fig. 10. Some of the spermatic vesicles. S. 1. 



PLATE CYN. XIII. 



Fig. 1. Specimen of Styela Etheridyii, n. sp., from the left side, nat. 



size. 



Fig. 2. Part of the branchial sac. S. 1 

 Fig. 3. Dorsal tubercle of one specimen. S. 1. 

 Fig. 4. Another of the same. S. 1, 



