MIDDLE CHALK—MICROSCOPIC STRUCTURE. 
525 
The following is a list of all the Foraminifera identified by Mr. 
Chapman from our washings and residues:— 
Middle Chalk Foraminifera. 
Zone of Rhynch. 
Cuvieri. 
Zone of 
Ter. 
gracilis. 
Mel bourn 
Rock. 
Higher 
Beds. 
Rhizammina indivisa, Brady 
. 
X 
X 
Reophax sp. nov. - 
- 
- 
X 
- 
— 
Haplophragmium sp. - - 
- 
- 
- 
X 
X 
Ammodiscus charoides, J . and P.- 
- 
- 
X 
X 
X 
,, gordialis, J. and P. sp. 
- 
- 
- 
X 
X 
„ incertus, d'Orb. 
- 
- 
X 
— 
X 
„ tenuis, Brady 
- 
- 
— 
— 
X 
Trochammina sp 
- 
- 
X 
— 
— 
Textularia agglutinans, d'Orb. 
- 
- 
— 
— 
X 
,, minuta, Berth. 
- 
- 
X 
— 
— 
„ trochus, d'Orb 
- 
- 
— 
X 
X 
,, turris, d'Orb. 
- 
- 
— 
X 
X 
Tritaxia tricarinata, Reuss 
- 
- 
— 
— 
X 
Gaudryina filiformis, Berth. - 
- 
- 
— 
X 
X 
„ rugosa, d'Orb. 
- 
- 
- 
— 
X 
Bulimina afhnis, d'Orb. 
- 
- 
— 
X 
X 
,, brevis, d'Orb. 
- 
- 
— 
X 
X 
,, elongata, d'Orb. 
- 
- 
— 
— 
X 
„ Orbignyi, Reuss - 
- 
- 
- 
- 
X 
„ Presli, Reuss 
- 
- 
— 
X 
X 
,, murchisoniana, d'Orb. - 
- 
- 
— 
— 
X 
Bolivina textularioides, Reuss 
- 
- 
— 
— 
X 
Marginulina, sp. - 
- 
- 
- 
- 
X 
Vaginulina recta, Reuss 
- 
- 
- 
- 
X 
Cristellaria cultrata, Montf. 
- 
- 
— 
X 
X 
„ gaultina, Berth. 
- 
- 
— 
- 
X 
,, Bronni, Roemer- 
- 
- 
- 
- 
X 
,, convergens, Born. 
- 
- 
- 
- 
X 
Globigerina cretacea, d'Orb. 
- 
- 
— 
— 
X 
„ marginata, Reuss. 
- 
- 
- 
X 
X 
,, sequilateralis, Brady 
- 
- 
- 
- 
X 
Anomalina ammonoides, Reuss sp. 
- 
- 
— 
X 
X 
Truncatulina ungeriana, d'Orb. - 
- 
- 
— 
X 
— 
,, lobatula, Walker sp. 
— 
X 
f 
„ akneriana, d'Orb. - 
- 
- 
— 
X 
— 
Pulvinulina sp. 
- 
- 
— 
— 
X 
Rotalia Soldani, d'Orb , var. nitida, Reuss 
— 
X 
X 
