478 THE DEPTHS OF THE SEA. [cHaP. x. 
in thickness, were elevated above the waters and 
became dry land; the only essential difference would 
be in the generic and specific characters of the im- 
bedded animal and vegetable remains.’ In 1858 
Professor Huxley spoke of the Atlantic mud as 
““modern chalk.” * Very early the identity of some 
of the chalk foraminifera with species now living was 
observed. Mr. Prestwich, in his able résumé of this 
question, so often quoted, gives a table drawn up by 
Professor Rupert Jones of 19 species of foraminifera 
out of 110 from the Atlantic mud identical with 
ehalk forms, viz. -— 
| 
| 
| Other older Formations in which 
they are also found. 
Species of Foraminifera found in both the Atlantic ; . 
| Mud and the Chalk of England and Europe. nS 49 og =| a 
| } aa |ee|eh | @ jae 
| Se} ee les | & | ss 
51S | 2 a Sepia 
——n ee oes = | es. 
| | | 
| Glandulina levigatt, D’ORBIGNY . x | 2) Sec Sala 
Nodosaria radicula, Linn. . x | Xeni 
cA raphanus, LINN. = x x = el 
Dentalina communis, D’ORBIGNY SC al Se NY eS KT OK 
Cristellaria cultrata, Mont. x x x = | = 
2p rotulata, LAM. vee Gute ee, Gilt | = 
crepidula, F. and M. . x =|. sa le 
| 
bases na sulcata, W. and J. 
| » globosa, Monracu ae _ 
Polymorphina lactea, W. and i : x 
x communis, 1)’ Ornieny. eee 
compressa, D’ORBIGNY. << <i) a 
orbigniz, HR: 2 SS = 
Globigerina bulloides, D’ORBignyY . . | =>) 2 =a 
Planorbulina lobatula, W.andJ. . = | 
| Pulvinulina micheliana, D’ORBIGNY . =| 
Spiroplecta biformis, P.and J... Se |e 
Vernewlina triquetra, VoN M.. . . (=o) Olea 
polystropha, Reuss ae i | a = 
99 
99 
1 Wonders of Geology, 6th edition, 1848. Vol. i. p. 305. 
2 Saturday Review. 
