xviii biological society of washington. 



One Hundred and Eighty-second Meeting, 

 November 14, 189 1. 



The President in the chair, and thirty-one members present. 

 Mr. T. S. Palmer read a paper entitled The Winter Aspects 



OF THE MOJAVE DESERT REGION. 



Dr. V. A. Moore spoke of a case of Echinococcus in 

 Swine.* Discus.sed by Drs. Smith and Stiles. 



Dr. C. W. Stiles pre.sented a paper entitled NoTES ON Para- 

 sites, describing Coccidium bigeminuni a.n<X Filaria gasterostei.'\ 



Prof. Eester F. Ward .spoke of Haeckel's Radiolaria of 

 THE Challenger Expedition, and presented a communica- 

 tion entitled Three Days in the Tropics. The latter was 

 discussed by Dr. Merriam and Mr. Coville. 



One Hundred and Eighty-third Meeting, 



November 28, 1891. 



The President in the chair, and thirty-six persons present. 



The following active members were elected on recommenda- 

 tion of the Council : 



Mr. W. E. Clyde Todd and Mr. J. D. Figgins. 



Dr. George Marx read a paper on The Structure and 

 Construction of the Geometric Spider Web. Dis- 

 cussed by Dr. Th. Gill. 



Mr. David White presented a paper entitled Some Peculiar 

 Forms in an Uplajstd Carboniferous Flora. ;]; It was dis- 

 cussed by Prof Eester F. Ward. 



Prof F. H. Knowlton presented a paper on Fruiting 

 Ferns from the Laramie Group. Discussed by Professor 

 Ward, Mr. C. D. Walcott and Dr. Cooper Curtice. 



*Amer. Journal of Comp. Med. and Vet. Archives and Annual Report 

 of the Dept. of Agriculture, 1891. Report on Animal Parasites for 1891, 

 C. \V. Stiles. 



t Proc. U. S. Nat. Museum, 1892. Note preliminarie sur quelques 

 Parasites, Bull. d. 1. Soc. Zool. d France, 1891, pp. 163-165. 



t Bulletin 98, V. S. Geological Survey. (In press.) 



