the Nomenclature of the Foraminifera. 213 



for an attempt to correlate them with known species and 

 varieties.) 



In the ' Abhandl. Berlin. Akad.' for 1847, pp. 442 &c., many 

 extremely minute Foraminifera, occm-ring in Wind-dust on 

 different occasions in several parts of Em-ope, form part of the 

 curious gatherings of invisible things that wind-storms make 

 and disperse in their whirlings over the surface of the earth — 

 sweeping the sea-shore, sand-bank, and dry river-bed, the 

 volcano, the desert, and the ploughed field, for organic and 

 inorganic particles, and winnowing its dusty harvest over dis- 

 tant and far different areas. These tiny Foraminiferal waifs 

 are still less teaching than those of 1841 as to genera and 

 species, though they are potent witnesses of the path and 

 doings of the wind-storm. 



In 1854, however, the crowning of his favourite labour was 

 accomplished for the Foraminifera, in the publication of 

 Ehrenberg's ' Mikrogeologie,' with the recognition and aid of 

 the State. In this grand work, besides multitudes of fossil 

 Diatomaceae, Polycystina, Spongoliths, &c., the long-looked-for 

 Foraminifera were depicted with the best artistic skill, with 

 loving care, and right royal liberality. 



The late Mr. Thomas Weaver, F.E.S. &c., in the 'Annals 

 and Magazine of Natural History,' vol. vii. (June 1841), 

 pp. 296 &c., and (July) pp. 374 &c., and in the '■ Philosoph. 

 Mag.' ser. 3. vol. xviii. pp. 375 & 443, contributed a full abs- 

 tract of two of Dr. Chr. G. Ehrenberg's memoirs — (1) On 

 the Composition of Chalk Rocks and Chalk Marl by invisible 

 Organic Bodies*, and (2) on the numerous Living Species of 

 Animals foimd in the Chalk Fonnation f — together with an 

 Appendix touching the Eesearches of M. Alcide D'Orbigny 

 on the Foraminifera of the White Chalk of the Paris BasinJ. 



Dr. Ehrenberg's memoir "On the muddy deposits at the 

 mouths and deltas of various rivers in Northern Europe, and 

 the Animalcules found in these deposits " (from the '■ Abhandl. 



* " Ueber die Bildung der Kreidefelsen und des Kreidemergels durch 

 unsichtbare Organismen," Abhandl. Berliner Akad. Wissensch. fiir 1838, 

 pp. 59-149, 4to, 18.39. 



t " Ueber noch zablreich jetzt-lebende Thierarten der Kreidebildung," 

 Abhandl. Berl. Akad. Wiss. fiir 1840, 4to, 1841. This memoir is trans- 

 lated in full, and illustrated with the original plates, in ' Taylor's Scientific 

 Memoirs,' vol. iii. art. xiii. pp. 319 &c. plates v.-viii. 



X Memoires de la Soc. Geol. de France, vol. iv. 1' partie, 1840. A notice 

 of the Rev. W. Buckland's paper in the ' Edinb. New Phil. Journ.' April 

 1841, on the discovery of fossil Foraminifera in the Mountain-limestone 

 of England, by MM. Tennant and Darker, in 1839, is also included in this 

 Appendix by Mi-. Weaver. 



