156 



DREDGINGS OF THE MARINE BIOLOGICAL ASSOCIATION: 



EOCENE. 



M. 77b. S. 11° W. Edd., 38 8 miles. 



A rough-textured cream-coloured limestone, rather soft, and closely 

 resembling, the ' calcairc grossier ' of the Paris Basin. 



Fine gravel or coarse sand is sparingly visible in the hand specimen. 

 The microscope shows clear quartz grains, many of considerable size, 

 and in the^'quartz fluid inclusions with bubbles. Fragments of 



o 



i M^ 



Fig. 2. Sections of foraniiiiifera from M. 77b. 



1.2.3.5. Miliolina {Qidnqucloculina) scminulum. 

 4. Miliolina ( Ti'iloculina) angularis. 



'RM.w: 



hydroids and of corals are clearly distinguishable. But the feature of 

 the rock is its foraminiferal character. Various forms of Miliolina 

 preponderate; these certainly include Miliolina semimdnm, Miliolina 

 trigonula, Miliolina {Triloculina) angularis (d'Orbigny), and possibly 

 other varieties. 



Of other foraminifera Truncatulina reftdgens (Mont.) is identifiable, 

 and there appear to be two species of Discorhina ; one species of 



