262 



EXPLANATION OF PLATES. 



Pt.ate V. 



Fig. I. — Pldcospoiigia labxriiithicd, sp, n., showing oscular areas, 

 the large poral surface being on the opposite side, x | ; 

 16, poral surface, x i. 



Fig. 2. — Lntriinculia iiatalciisis, sp. n., x 2. 



Fig. 3. — Kalastrella vasifoniiis, sp. n., x i. 



Fig. 4. — KdhistrcUd vasiforuiis, var. uilnoi; x \. 



Fig. 5. — Coppatias baciilifer, sp.n,, on Stdlctta horrcns, Kirkp., x ^. 



Fig. 6, — Tethva magna, sp. n., x i ; 6a, poral areas, x 2. 



Fig. 7. — Tracliva uiida, sp. n., x \. 



Fig. 8. — Hyincniacidoji caliculatiun, sp. n., x ^. 



Fig. 9. — PhakcUia iiiicroxcpJiora, sp. n., x ^. 



Fig. 10. — Tragosia i iifit ltd ibiil iforjiiis, viw . natalcnsis,var. nov., x^. 



Fig. II. — Syiiiigclla gorgonioidcs, sp. n., Fragment, x i. 



Fig. 12. — Axhiyssa tethyoides, sp. n., x ^. 



Fig. 13. — Sigmaxinella arborca, sp, n., x ^, 



Fig. 14. — Bubaris reptans, sp. n., on Haliclioiidria pachastrell- 

 oides, Topsent, x \ ; Fig. 14^, a small piece, from a 

 specimen preserved in formalin, showing oscular (and 

 poral ?) papillae, x 2. 



Fig. 15. — Clatliria mollis, sp. n., x ^. 



Fig. 16. — Stvlosliclioit iiivoliilitm, sp. n., x h 



Fig. 17. — Histodcniia iiatalciisc, sp. n., x 2 ; 17^, portion of 

 another specimen attached to worm tube, x 2. 



Fig. 18. — Phlccodidyon cnmilniii, sp. n., x ^. 



Fig. 19. — Cosclnodcniia toncciitiicinn, x 3 ; 19^, sandy cortex 

 from outer surface showing poral areas, x 4. 



