BRITISH ASSOCIATION. 511 



referrible to a new genus, and many undescribed species of Holothuria, 

 Eolida, <Scc. Mr. Lyell made some observations upon the marsupial and 

 quadrumanous remains from the London clay near Woodbridge, and 

 mentioned the discovery of some teeth belonging to the larger Carnivora 

 in the red crag of the same neighbourhood; — a tertiary deposit in 

 which traces of terrestrial mammals had not previously been recorded. — 

 Some little doubt appears to have existed in the mind of Mr. Lyell, as to 

 the contemporaneous deposition of the red crag and the stratum from 

 which the mammiferous teeth were taken, the possibility of their hav- 

 ing been subsequently introduced through fissures in the quarry be- 

 ing suggested. This part of the crag has been so extensively explored 

 without any traces of land animals being observed, that the question 

 is one which should be examined with extreme caution ; as, however, the 

 remains of quadrupeds occur abundantly in the mammaliferous crag, and 

 occasionally, as it now appears, in the London clay of the same neigh- 

 bourhood, we may anticipate that sooner or later indications of their 

 existence will be found in the whole of the tertiary rocks which occupy 

 that district. 



Professor Schonbren of Basle informed the Geological Section that 

 Agassiz had just commenced the publication of a supplement to his 

 ' Poissons Fossiles', which he had dedicated to the British Association, 

 as an acknowledgement of his gratitude for the assistance afforded him 

 by that body. This announcement completely nullifies the proposition 

 not very shrewdly, as we think, put forward by Agassiz in his late vindi- 

 catory epistle, wherein he intimates his perfect willingness that cheap 

 fac similes of his plates should be published in England, as the com- 

 pletion of his own work, and the removal of the drawings from the litho- 

 graphic stones, would render such a proceeding beneficial to science, 

 without being injurious to his own interest. The 'Poissons Fossiles* 

 and the ' Mineral Conchology,' from their nature, are necessarily con- 

 tinuous publications, unless a want of means or inclination on the part 

 of their respective authors to carry them forward, puts a temporary or 

 final interruption to their progress. 1 



Among the recommendations resolved upon by the Association, we 

 notice one from the Geological section, recommending, " that application 



1 The attempt to obtain a sale in this country of the French edition of 

 the • Mineral Conchology,' has been a total failure. We learn from 

 M. Agassiz's Agent, that only one copy has been disposed of, and that 

 to the author of the original work ! 



