OF THE SELENARIAD^E, CONESCHARELLINID.E, ETC. 425 



EXPLANATION OF THE PLATES. 

 Plate 29. 



Pig-. 1. Cupularia canariensis, Busk, X 25. Stained transverse section showing the shallow 

 central zocecia (c.z.), which have grown upon some substance removed in decal- 

 cification, and the large zocecia (/.;:.), as well as the vibracular chamber (v.) shown 

 near the periphery of the zoarium. The lower part of the zoarium is formed by 

 a series of parallel chambers filled with granular contents and connected by 

 rosette-plates. 



2. Do. do. X 200. Lower part of chambers with contents. A and B are 

 connected by a rosette-plate, whereas B and C are close together but not 

 connected at this level. Transverse wall (t.w.). Lateral wall of the series (l.to.). 



3. Uo. do. X 250. Transverse section showing contents of the chamber 

 and the large cells. 



4. Bo. do. x 25. Transverse calcareous section showing chambers. 



5. Uo. do. x 25. Decalcified base of the zoarium, with muscles of one 

 vibraculum. 



6. Conescharellina angidopora, T. Woods, x 25. Calcareous section, showing the 



chambers at the base of the cone, a x 3. From Port Stephens, N. S. Wales. 



7. Selenaria punctata, T. Woods, X 12. Showing a piece from which the central 



supporting flake has disappeared. From Port Stephens, N. S. Wales. 

 S. Selenaria metadata, Busk, X 12. Showing a piece of shell on which the colony 



has commenced to grow. It will be noticed that the early central zocecia are 



very small. From Holborn Island. 

 9. Selenaria petaloides, d'Orb., x 6. Starting on shell. Fossil from Wanganui, New 



Zealand. 



10. Vihracella trapezoidea, Keuss, X 12. Colony growing on Orbitoides stellata, 



Giimbel. Fossil from Bocca di Sciesa, Colle Berici, N. Italy. 



11. Conescharellina philippinensis, Busk, X 25. Basal view showing small chambers 



with avicularia and others either broken down or incomplete. From Port 

 Stephens, N.S.W. 



12. Do. do. x 25. Section showing zocecia and basal cells. 



13. Do. do. X 25. Quadrant of upper surface showing some of the semi- 

 lunar slits. 



14. Cupularia canariensis, Busk, X 85. Showing connecting tubes to the zocecia and 



to the vibracular chambers. From Madeira. 



15. Cupularia Lowci, Busk, x 250. Chamber of peculiar body of the vibracula 



showing two small glands ((/!.). 



16. Conescharellina conica, Ilaswell, X 25. Calcareous section showing subsequent 



calcareous growth over the apex. From N.F. coast of Australia. 



17. Cupularia Jolmsoiri, Busk, X 25. Under side of the cone showing spinous pro- 



cesses. From Madeira. 



18. Trochopora conies, Def., Xl2. Lower surface. From Salles (Gironde) ; Helvetian. 

 10. Conescharellina angulopora, T. Woods, X 25. Upper surface. There are two 



semilunar slits without the plate (s.s.). From off Port Stephens. 

 20. Conescharellina conica, Ilaswell, x 25. Lower surface. From N.E. const of 

 Australia. 

 I. INN. J < > I : ] : N . — ZOOLOGY, VOL. XXN1V. 33 



