1871.] 123 [DaU. 



cording to Agassiz, again evinces the action of elevating forces. 

 These and other facts, which investigation would readily establish, 

 prove that a series, or perhaps many series, of more or less local 

 waves of elevation and depression run down the coast at right 

 angles to the direction of the great waves which created the Appala- 

 chian folds. . 



Section of Microscopy. Feb. 8, 1871. 



Mr. E. Bicknell in the chair. Seven members present. 



The Recording Secretary being absent, on motion of Mr. 

 W. F. Whitney, Mr. A. H. Tuttle was appointed Secretary 

 pro tern. 



Mr. Chas. K. Stevens and Dr. Geo. B. Harriman were 

 elected members of the Section. 



The Chairman called attention to photographs of Amphu 

 pleura pellucida and Surrirella gemma, taken by Dr. Wood- 

 ward, of the Army Medical Museum, and exhibited by Mr. 

 Chas. Stodder. 



Mr. A. H. Tuttle made some remarks on the fissiparous re- 

 production of Stentor, with reference to the direction of the 

 plane of fission in Stentor, and in other ciliate infusoria. 



Feb. 15, 1871. 



The President in the chair. Thirty-eight persons present. 



The Secretary read the following paper : 



On the Relations of the Class Brachiopoda. By W. 

 H. Dall, Washington, D. C. 



Having received a report, presumably correct, of some remarks by 

 Mr. E. S. Morse in relation to my views of the relations of this class, 



