C. Davies Sherhorn — Paleontologie Frangaise. 223 



YII. — On the Dates of the " Paleontologie Franoaise " of 



D'Orbigny. 



By C. Davies Sherborn. 



THE first six volumes of Cretaceous Fossils and the first two 

 volumes of Jurassic Fossils, described in this work, were issued 

 without exact dates, and consequently have caused much confusion 

 in nomenclature. 



Information has been obtained from many sources, but that from 

 the Neues Jahrbuch seems on the whole more continuously exact. 



CRETACEOUS SERIES. 

 Vol. I. — Cephalopoda. 



Livr. 1-3, 1840 (N.J., 1840, p. 690). One sheet to each livr. 



3 [4] - 21, 1841 (N.J., 1841, p. 463). 



12 [22] - 17 [27], 1841 (N.J., 1842, p. 104). 



28-32, 1841 (N.J., 1842, p. 235). 



33-42, pp. 431-662, 1842 (N.J., 1842, p. 455). 



The above is the evidence from the Neues Jahrbuch as regards 

 vol. i, but it is evidently so carelessly recorded, markedly so in 

 comparison with the later records, that one must take further 

 evidence. We find that the Geological Society of London received 

 as a present from the author livraisons 1-20, and of these livraisons 

 9 and 10 were received on January 4, 1841. It will be quite safe, 

 therefore, to regard livrs. 1-10 as belonging to 1840. Now the 

 Neues Jahrbuch says that each of the three first parts contained 

 one sheet, and an examination of the volume shows that on this 

 assumption livrs. 1-10 would contain 120 pp. (for the sheets are 

 in 4's and 8's). The Neues Jahrbuch is very clear as to the pages 

 contained in livrs. 33-42, and as this is the beginning of their 

 careful record, one may accept the statement as accurate, and we are 

 left with pp. 121-430 for the year 1841. My friend Mr. G. 0. 

 Crick, who has examined this volume with me, agrees in determining 

 the date of vol. i. Cretaceous Cephalopoda, as — 



pp. 1-120, 1840. 

 121-430, 1841. 

 431-662, 1842. 

 Supplement, 1847 (see below, vol. iii). 



The further volumes present no difficulties, and there appears no 

 reason to doubt the record furnished by the Neues Jahrbuch. 



Vol. II. — Gasteropoda. 



„ (N.J., 



(N.J. 



Livr. 



43-48 



pp. 



1-80 



1842 





49-60 





81-288 



1843 





61-70 





289-456 



1843 



Vol. III. 



— Pelecypoda. 







Livr. 



71-76 



pp, 



1-96 



1844 





77-90 





97-288 



1844 





91-102 





289-448 



1845 





103-106 





449-480 



1846 





107-111 





481-520 



1846 





112-116 





521-576 



1847 





117-126 





577-688 



and Supj 



1842, 



P- 



843) 



1843 





602 



1844 





60 



1844, 



P' 



, 461) 



1845 





195 



1845 





809 



1846 





479 



1847 





198 



1847 





467 



577-688 and Supplement to vol. i (Ceph.), consisting of 

 livr. 1 and 2, pp. 1-28, pis. ii-ix : 



1847 ... (N.J., 1847, p. 827) 



