Quadrupeds. 281 



examination, it is seen that the union does not exist merely between 

 the surfaces of the bark, or between the edges of the axis, but through- 

 out the opposing surfaces. In some cases the union takes place im- 

 mediately the surfaces of the axis come in contact, but in others the 

 homy branches have been worn half through, and then united ; and 

 in a case now before me one branch has become intertwined with se- 

 veral others, and united to them in four distinct places, and one point 

 of adhesion is half an inch in extent. From these considerations it 

 appears that Lamarck's theoretical opinions are inconsistent with 

 facts ; and though Dr. G. Johnston has given them his support, yet I 

 have no doubt he will, on re-examination, find sufficient reasons to 

 modify his present opinions, and support the vitality even of the axis 

 of the Gorgonia. The evidence of such being the case is accumula- 

 tive ; but the mode in which the branches are formed, in the old as 

 well as the new parts, and the adhesion or union of the axis of dif- 

 ferent branches, by what Hunter would call the first intention, are 

 circumstances sufficiently decisive in themselves. 



R. Q. Couch. 



Polperro, July, 1843. 



Nollce of Fossil Slolhs.* 



Mylodon robustus, Owen. 



* Description of the Skeleton of an Extinct Gigantic Sloth, with Observations on 

 the Osteology, Natural Affinities and probable Habits of the Megatherioid Quadru- 

 peds in general. By Richard Owen, F.R.S.,&c. Loudon : Van Voorst. 1842. 



