Alcide d'Orhlgny. 67 



The section concludes witli a " liesinne geologi<|ue sur les 

 Eoraminiferes." He condenses his views on geological distribu- 

 tion from the Vienna Memoir, as also his views on geographical 

 distribution {ante, p. 5()), and his statements as to the occurrence 

 of recent forms is as generalized, and consequently incomplete, as 

 before. The section is "illustrated" in the Atlas of "Talaleaux," 

 issued with vol. ii. in 1852, by plate 14, which gives ^ in a tabular 

 form a " Repartition des Genres et des Especes de Foraminiferes 

 k la surface du globe terrestre depuis le commencement de 

 I'Animalization Jusqu'a I'epoque actuelle," in which the genera 

 are set out in the order of their appearance in the geological 

 record (beginning with Fusulina), with a series of signs denoting 

 their appearance, disappearance, maximum, minimum, and so on. 



Later in the volume he repeats bis theory of successive 

 creations for all his twenty-seven zones and their extinction 

 seriatim — which, as we have not yet had occasion to remark, 

 made its first appearance — which he announces here as Q,Jact — in 

 the " Paleontologie Fran('aise " (vol. ii.', p. 423).- He goes so far 

 in this place as to set down as another fact, that there are no 

 intermediate links between the fauna of one zone and that of its 

 succesijor — everything lias been radically changed from zone to 

 zone by Catastrophal Destruction {aneantissement brusque). It is 

 noticeable also that even in this last work of his upon the 

 Foraminifera he again ignores the genus Lagena, though he must 

 have known of the work of Williamson, whose paper on the genus 

 had been published in 1848,^ and who appears in his list of 

 correspondents in the " Prodrome." Indeed, as I close these 

 terminal leaves of d'Orbigny's published work on the group, I am 

 forcibly reminded of Dr. A. D. Godley's " Address by a Professor 

 to his Lecture " — 



" Though Truth enlarge her ■widening range, 



And Knowledge be with Time increased. 



While Thou, my Lecture ! dost not change 



The least, 

 But fixed, immutable amidst 



The advent of a newer Lore 

 Maintain est calmly what thou didst 

 Before t " 



1850 (it appeared, I think, for the first time as fig. 4 on pi. iii., in Carpenter's 

 first paper on the Foraminifera in 1849 (see note 1, p. 71), and again in the first 

 edition of his work on the Microscope in 1856). The other three may be original 

 <I have not been able to locate any originals from d'Orbigny's synonymies in the 

 " Prodrome "), but they are vastly inferior to anything d'Orbigny had ever given 

 as an ill istration before. 



' 2^0 species are mentioned. 



- XIV., vol. ii., pp. 251-2. 



* W. C. Williamson, " On the Recent British Species of the Genus Lagena," 

 Ann. Mag. Nat. Hist., ser. 2, i. (1848) pp. 1-20, pis. i. and ii. 



F 2 



