PROCEEDINGS. XXI 



Mr. C. D. Walcott exhibited a SECTION OF A FOSSIL ENDO- 

 CERAS OVER EIGHT FEET IN LENGTH, and explained its structure 

 and relations to other shell-bearing Cephalopoda, both fossil and 

 recent. 



Mr. Leonhard Stejneger read a paper entitled How THE GREAT 

 NORTHERN SEA Cow, RHYTINA, BECAME EXTERMINATED.* 



ONE HUNDRED AND EIGHTEENTH MEETING, Dec. 31, 1887. 



The President occupied the chair, and sixteen persons were 

 present. 



Mr. W. J. McGee spoke upon THE OVER-LAPPING HABITATS 

 OF STURNELLA MAGNA AND STURNELLA NEGLECTA, IN IOWA. 



Dr. C. Hart Merriam exhibited and described A NEW SPECIES 

 OF FIELD MOUSE, ARVICOLA (CHILOTUS) PALLIDUS, FROM THE 

 BAD LANDS OF NORTHWESTERN DAKOTA. 



Mr. W. B. Barrows described THE SHAPE OF THE BILL IN 

 SNAIL-EATING BIRDS, with special reference to the Kite, Ros- 

 trhamus sociabilis, and the " crying" birds, Aramus. 



A paper by Mr. H. Justin Roddy, on the FEEDING HABITS OF 

 SOME YOUNG RAPTORES, was read by Mr. Lucas. 



ONE HUNDRED AND NINETEENTH MEETING, Jan. 14, 1888. 

 (Eighth Annual Meeting). 



The President occupied the chair, and twenty-seven members 

 were present. 



The annual reports of the Secretary and Treasurer were read 

 and accepted. 



The following board of officers was elected for the ensuing 

 year : 



President Mr. William H. Dall. 



Vice-Presidents Dr. .C. Hart Merriam, Prof. L. F. Ward, 

 Prof. C. V. Riley, Mr. Richard Rathbun. 



* 1887. American Naturalist, xxi, pp. 1047-1054, December. 



