No. 490] NOTES AND LITERATURE 



659 



Zoology.— Dr. C. F. Rousselet of T^ondon exhibited fifteen slides 

 of rotifers. They were remarkably fine, since by a special method 

 tlie aninuds had been preserved in an extended condition. They 

 were killed in a % aqueous solution of osmic acid, and sealed in 7% 

 formalin on hollow ground slides. During the congress Dr. Rousselet 

 identified fifteen species of rotifers which he obtained in one "dip" 

 from the pond in the Public Garden. 



Professor J. A. Thomson of the University of Al)erdeen showed 

 new and rare forms of corals chiefly from the ln<li;iii ocean. They 

 included a specimen of the remarkable new u(miiis Mu<l( ria lioiii i In- 

 littoral region of the Andaman Islands. 



Miss E. R. Gregory, professor of bioln^-y ai Wells CdIIc^c. 

 York, demonstrated the structure of tlio saii«l ([ollar, Krliinaracliinu.. 



Drs. F. B. Sumner and J. W. rii.K'nvoo.l have sin. lied -'ilir scrui- 

 ingly protective coloration of the -rasiropod I.iloniui jxi/lidla" at Woods 

 Hole, and they exhibited water color dr<i^^in->, n.a<le i.y K. U.y..Uu 

 of the shells and the sea wec<l upon ^^ liich thcv Hm". I1.e sh.-lL-, \arv 

 from dark brown or black to l)iight ^cllo^^ and th.^y may becMtlur 



brown to yellow. The snails, however, do not select ai)pr()priate 

 backgrounds, either experimentally or in naiiuv. ()\(r variously 

 painted sectors of a glass dish their distrii)niion is pun lv bv chance,. 



