INDKX. V 



46, 47. Siliceous spicula of Halichoudrium. 



48. Muricated sponge spiculum. 



49. Calcareous spiculum — probably of one of the Eolidse. 



50. 51, 52. Rudimentary plates of Echinodermata. 

 53. Cribriform fragment of a matured Echinoderm. 

 .54. Lamina of Pinna. 



55. Portion of a detached prism of the same. 



OBJECTS FROM THE CHALK OPACIUE. 



56. Rotalia, upper surface — Charing. 



57. Ditto, lower surface — Charing. 



58. Robulinaor Cristellaria, oral orifice not distinct — Charing. 



59. ? Charing. 



60. Rotalia globulosa Ehr. Discorbis Lyell's Elements, p. 55 



— Charing. 



61. Textillaria globulosa Ehr. — Charing. 



62. Textillaria — Charing. 



63. Yerneueilina ? Charing. 



64. Lateral aspect of some genus alhed to Textillaria — • 



Charing. 



65. Base of the same — Charing. 



66. Marginulina — Charing. 



67. Cristellaria — Charing. 



68. Ditto ? Charing. 



69. 70. Dentalina : two species — Charing. 



