JRemeivs — Jenkins' Hypothetical Contiiients. 469 



1. That hypothetical continents belong to two categories ; namely, 

 first, those supported hy physical evidence ; and, secondly, those 

 unsupported in that respect. 



2. That while the Miocene Atlantis and Lemuria come into the 

 second category, the Eocene Atlantis and the possible Pacific con- 

 tinent come into the first. 



3. That the theory of a Miocene Atlantis and that of Lemuria 

 each explains only one portion of the palasontological facts that call 

 for elucidation; while the theory of an Eocene Atlantis explains 

 the whole of the facts of both cases. 



4. That for these reasons it is probable that the Miocene fauna 

 and flora of Europe came from America during the Eocene period 

 by way of the Eocene Atlantis ; and that since the Miocene period 

 they spread over Asia and Africa, and the eastern seas, and that a 

 part of the flora returned to America by way of Northern and 

 Central Asia and Japan. 



5. That the fact of American Cretaceous and Eocene plants uni- 

 formly occurring in older deposits than a European palseontologist 

 would, a priori, consider possible, is of itself a most remarkable 

 confirmation of two theories ; namely, (1), that ^organisms have 

 migrated from west to east {e.g., from America to Europe in Eocene 

 times) ; and (2), that deposits in the Old and New Worlds should be 

 treated as homotaxeous and not as contemporaneous. 



British Association foe, the Advancement of Science, 

 Nottingham, 1866. 



SECTION C— GEOLOGT. 



President : Professor A. C. Eamsay, LL.D., E.E.S., V.P.G.S. 



List of Papers read before the Geological Section : — 



S. Hich and J. W. Salter — Second Eeport on the Geology of St. 



David's, Pembrokeshire. 

 H. Woodward — Second Eeport on the Fossil Crustacea. 

 W. S. Mitcliell — Eeport of the Committee appointed to investigate 



the Alum Bay Leaf -bed. 

 J. Givyn Jeffreys — Eeport on Dredging among the Hebrides, with 



regard to Geological considerations. 

 ' Dr. Leith Adams — Second Eeport on the Maltese Caves. 

 Professor Witchcoch — On the Geological Distribution of Petroleum in 



North America. 

 W. Pengelly — On Eaised Beaches. 

 C. Spence Bate — An attempt to approximate the date of the Flint 



Flakes of Devon and Cornwall. 



