PALÉOZOOLOGIE ET PALÉOPHYTOLOGIE 77 



are : 1° Club-like nodes of the stem ; 2° clusters of clavate processes on 

 stem and branches ; 3° a utricle enclosing the oogonium. 



E. M. Reid. 



Reid, Clément and Reid, Eleanor-M., A new fossil Corema. Journ. Bot. 

 — May 1914 — pi. 531. 



The species was first discovered in the Cromerian ; later it was found in 

 the Teglian; but in both Cases was wrongly referred to the genus Viburnum. 

 The study ofthe Reuverian seeds,and the conséquent systematicexamination 

 of Palaearctic species, led to the discovery of the species in the Reuverian, 

 and its true ascription to the genus Corema, under the name C. iniermedia 

 sp. nov. 



E. M. Reid. 



Reid, Clément and Reid, Eleanor-M., La flore pliocène de Bidart et 

 Cénitz. Bull. Soc. Géol. de Fr. — 1915 — 4e série, t. XV., pp. 420-427. 



Describes a small flora from two localities on the Biscay coast, south of 

 Biarritz. It was considered by the authors to be of the same âge as the 

 Reuverian. 



E.-M. Reid. 



Reid, Clément and Reid, Eleanor-M., The pliocène floras of the Dutch- 

 Prussian border, Meded. Bijksopsporiiuj van delfstoffert, n° 6 — 1915 — 

 pp. 1-178, pis i-xx. La Haye. 



Describes a large collection of seeds derived from lignitic clays and loams 

 found at three localities on the Dutch-Prussian border. The three deposits 

 proved to be of the same âge, but what the âge was, remained uncertain. 

 Stratigraphy showed it to be Pliocène ; study of the seeds showed it to be 

 older than the Teglian (Upper Pliocène). The flora was provisionally referred 

 to the top of the Middle Pliocène. 



The flora, named by the authors « the Reuverian », was found to contain 

 a large number of extinct and exotic species, of which the greater proportion 

 showed affinity to plants now endémie in certain mountain régions of the 

 East of Asia and of North America. The proportion of thèse exotics was 

 greater than that found in the Teglian, and greater still than in the Cromerian. 



The authors, accepting the earlier théories of a southward migration of 

 plants from polar régions during late Tertiary times, explain the graduai 

 extermination in Eurasia thus eviclenced, and the survival in the Far East 

 and in North America, as due to the différence in trend of the mountain 

 chains in thèse régions. The East-and-West mountain chains trapped ans 

 exterminated the plants. The North-and-South mountain chains not only 

 allowed free passage, but, during later Pleistocene oscillations of climate, 

 offered facilities for a change of climate by a change of altitude, and thus 

 became plant refuges. This theory explains many peculiarities in plant- 

 distribution at the présent day. 



Subsidiary to the polar migration there was probably migration also 

 from the Himalaya towards the Mediterranean and Atlantic. 



E.-M. Reid. 



