232 SCIENCE PROGRESS 



vania were described by Wherry (Proceed. U.S. Nat. Mus. 

 vol. li. pp. 327-9, pis. XXIX -XXX.). In the Cretaceous 

 Berry discussed the age of the Morrison formation (Bull. Geol. 

 Soc. Amer. vol. xxvi. pp. 325-42) in which occurred the 

 stumps of Cycadella. In this paper Berry concluded that 

 " presently we may expect some modern Huxley to enunciate 

 diastrophic homotaxis as opposed to diastrophic synchroneity." 



The Upper Cretaceous deposits of North America afforded 

 material to Knowlton, who illustrated good foliage impressions 

 from the Foxhills Sandstone (U.S. Geol. Surv. Profess, paper 

 98 H, pp. 85-93, pis. XV -XVIII.) from this generally rather 

 sterile deposit. In this, as well as dicotyledons and conifers, 

 he recorded " countless thousands of specimens " of an alga, 

 Halymenites major. Berry discussed the age of the Cretaceous 

 flora of Staten Island and Martha's Vineyard (Journ. Geol. 

 vol. xxiii. pp. 608-18), deposits which are notable palaeobotani- 

 cally as the source of the gymnosperms described some years 

 ago with wonderful internal detail by Jeffrey and Hollick. 



The Tertiary, also of the States, was the subject of one 

 of the two large memoirs of the year. Berry published a 

 monumental work on the Lower Eocene (U.S. Geol. Surv. 

 Profess, paper, 91, pp. 481, pis. CXVIL), one of the most im- 

 portant works on the Tertiary which has appeared for many 

 years. The bulk of the text and the illustrations dealt syste- 

 matically with the angiospermic foliage impressions, which, 

 as in most deposits of this age, formed the large majority of 

 the available remains. The first 160 pages dealt with the 

 stratigraphy, outcrop, distribution, character, ecology, and 

 correlation of the " Wilcox flora." Berry took a wide and 

 sound view of the demands of his subject, and pointed out 

 the importance of correlating what is known of the fauna, 

 general conditions, etc., of the area. " In work on deposits 

 that teem with the remains of marine life, as do many of the 

 Tertiary formations of South-eastern North America, it is 

 possible to arrive at very close approximations of the tempera- 

 tures of the coastal waters. It may be safely assumed that 

 boreal or temperate floras did not flourish in proximity to 

 tropical marine faunas and that plants reflected their environ- 

 ment in the past as in the present." Berry discussed the 

 difficulty of specific determinations from leaves alone, but 

 pointed out how much neglected leaves have been by recent 



