xviii biological society of washington. 



One Hundred and Forty-first Meeting, 

 March 23, 1889. 



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



Mr. W. H. Seaman read a paper on Our Present Knowl- 

 edge of the Rotifera. Discussed by Mr. Knowlton. 



Mr. C. L. Hopkins presented A Point of Definition rela- 

 tive to the use of the terms hybrid and cross. 



Mr. W. H. Dall described The Reproductive Organs in 

 Certain Forms of Gasteropoda.* . 



One Hundred and Forty-second Meeting , 

 April 6, 1889. 



The President in the chair, and fifteen members present. 



On account of the small attendance and the absence of paper- 

 readers (due to very inclement weather), the program was 

 postponed until the following meeting. 



One Hundred and Forty-third Meeting, 

 April 20, 1889. 



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



The death of Dr. J. H. Kidder, an active member of the 

 Society was announced by the President. 



Mr. J. F. James presented a paper entitled The Effect of 

 Rain upon Earth-worms, t Discussed by Drs. Merriam and 

 W. H. Fox, and Messrs. True and Ward. 



Mr. F. W. True read a paper on the Occurrence of 

 Sowerbv's Whale on the Coast of New Jersey. Dis- 

 cussed by Drs. Merriam and Curtice. 



*i889. Incorporated in Report on Blake Gasteropoda, Bull. Mus 

 Comp. Zool., Cambridge, Mass., Vol. XVIII. 



f 1889. Am. Nat., August. Issued Dec. 15, 1889 



