NOMENCLATURE OF " MICROSCOPIC OBJECTS " ETC. 135 



Sponge-spicula. 



References to the Memoir. Modern Nomenclature. 



Plate III. 

 f. 40. Spiculum of Tetheia (p. 26) Spiculum of a sponge. 



41. Ditto (p. 26) Spiculum of Tetheia. 



42. Globular cortical spicule of Geo-} Cortical icule of Geodia . 



dia(-p.27) J 



43. Spicule of ? (p. 27) Sponge spiculum. 



44. ? Ditto. 



45. Calcareous spicule of ? (p. 26) Ditto, calcareous. 



46. Siliceous spicule of HaUchondria~\ Siliceous acicular spiculum of 



(p. 25) J sponge. 



47. Ditto (p. 25) Siliceous capitate ditto. 



48. Muricated spicule of sponge (p. 27) . Siliceous muricate ditto. 



49. Calcareous spicule of one of the 1 Calcareous spiculum of Gor- 



Eolid<e? (p. 27) J gonia. 



Miscellaneous. 



fig. 50. Rudimentary plate of an Echino- 1 Rudimentary plate of an Echi. 

 derm (p. 53) J noderm. 



51. Ditto (p. 53) Ditto. 



52. Ditto (p. 53) Ditto. 



53. Cribriform plate (fragment) of a 1 Fragment of test of a matured 



matured Echinoderm (p. 53) ... J Echinoderm. 



54. Lamina of Pznna-shell (p. 52) ... { Lamina of *"»*&&> ™ wed 



I superficially. 



55. Portion of a detached prism of 1 Portion of a detached prism of 



the same (p. 52) J the same. 



Cretaceous Foraminifera. 



Plate IV. 



« k/i n j »■ / »k\ f Planorbulina Lorneiana 



f. 56. Sotaha (p. 75.) j (D'Orb.). 



57. Ditto (p. 75) Ditto. 



58. Bobulina, or Cristellaria (p. 75) ... Cristettaria rotulata (Lam.). 



59. ? (p. 75) ... Globigerina bulloides? 



Professor Rupert Jones informs me that lie has seen a 

 state of Globigerina bulloides from the Atlantic ooze like 

 the above figure. At the same time I am doubtful re- 

 specting the identity of the fossil with the well-known 

 living form. 



