proceedings. xiii 



Type of Fossil Cryptogamic Life from the Fort Union 

 Groups.* 



Dr. Cooper Curtice described the Sexual Differences in 

 Tricocephali. 



One Hundred and Thirty-third Meeting, 

 December i, 1888. 



Vice-President Ward in the Chair, and twenty-eight persons 

 present. 



Dr. Gill read a paper On the Relations of the Psychro- 

 lutid^.t 



Dr. C. Hart Merriam gave a description of A New Ground 

 Squirrel from California. £ Discussed by Prof. Riley and 

 Mr. True. 



Mr. F. W. True made some Remarks on the Deer of 

 Central America. § Discussed by Dr. Merriam. 



Prof. C. V. Riley read a paper entitled Notes on the 

 Economy of Thalessa and Tremex.|| 



Mr. B. E. Fernow discussed The Causes of Configura- 

 tion of Trees. Discussed by Prof. Riley and Mr. Ward. 



One Hundred and Thirty-fourth Meeting. 

 December 15, 1888. 



Vice-President Ward in the chair, and twenty-nine persons 

 present. 



* 1888. Abstract in Proc. Am. Ass. Adv. Sci. Vol. XXXVII, pp. 199-201. 



t 188S. Proc. U. S. Nat. Mus. 



X 1888. Merriam C. Hart. Description of a new Spermophile from 

 California. (Spermophilus beldingi). < Annals N. V. Acad. Sci. IV, 

 317-321, fig. skull. Separates issued December. 



; : 1888. Proc. U. S. Nat. Mus., pp. 417-424- 



I! 1888. Insect Life, Vol. I, p. 168. 



