136 NOMENCLATURE OF " MICROSCOPIC OBJECTS " ETC. 



References to the Memoir. Moderx Nomenclature. 



Plate IV. 



f. 60. Rotalia globulosa, Ekr. (p. 70) Globigerina cretacea, D'Orb. 



61. Textilaria globulosa, Ekr. (p. 70) ... Textilaria gibbosa (D'Orb.). 



62. Textilaria (p. 76) prcelonga (Reuss). 



63. VerneuUina (p. 77) ( Ver ™ uilina triquetra (Miin- 



L ster). 



64. Textilaria, genus near to (p. 76) ... Textilaria trochus. 



65. Ditto (p. 76) Ditto. 



66. Marginulina (p. 77) Vaginulina costulata (Reuss). 



67. Cristellaria{ V .Ti) { Cristellaria {?l*™laria) com- 



I planata (Reuss). 



68. Ditto (p. 77) Ditto, ditto, cymba (D'Orb.). 



09. Dentalina (p. 78) { Sma11 bent Nodosaria ™phanus 



I (Linn.), or N.obscura (Reuss). 



70. Ditto (p. 78) Dentalina communis, D'Orb. 



71. Lagena (p. 78) Coccolith. 



When investigating the cretaceous deposits I found vast 

 numbers of these small bodies, which, when viewed by 

 transmitted light, appeared to have a single central cavity 

 like that of the recent Lagena. There is no doubt, how- 

 ever, that these are the Coccoliths to which so much atten- 

 tion has been given during the last three or four years. 

 The above figure is a bad representation of the external 

 aspect of one of these small objects. 



fig. 72. Dentalina (p. 78) Dentalina communis (D'Orb.). 



73. Dentalina aculeata (D'Orb.) (p. 78) . aculeata (D'Orb.). 



74. Ditto Ditto. 



Cretaceous Entomostraca. 



f. 75. Cytherina echinulata, Williamson 1 Cythere (Cythereis) omatissima 

 (p. 78) J (Reuss)*. 



76. (p. 78) 



77. concentrica, W. (p. 79) Cythere concentrica (Roemer). 



78. umbonata, W. (p. 79) Cytheroptera umbonata (W.). 



79. serrata, W. (p. 79) { C y therella Williamsoniana (?) 



I (Jones). 



80. lavis, W. (p. 79) Muensteri (Roemer). 



* See Geological Magazine, no. 68, p. 75. 



