224 Scientific Intelligence. 
of apparently dried Rotifers were observed. These imbibed 
water and expanded, and some of them in the course of half an 
hour revived and exhibited their usual movements, but others 
remained motionless to the last. 
The same slides were again submitted to drying, and from one 
of them the cover glass was removed. They were examined the 
I next prepared a slide on which there were upward of twenty 
actively moving Rotifers, and exposed it to the hot sun during 
he aft 
revivified. Moisture adheres tenaciously to earth, and Rotifers 
may rest in the earth, like the Lepidosiren, until returning waters 
Amoeba. 
Philadelphia, he had discovered what he suspected to be a new 
generic form. It has all the essential characters of Ameba, but 
in addition is provided with tufts of tail-like appendages or rays, 
on 
Several forms of the Ourameba were observed, but it is uncer- 
tain whether they pertain to one or to several species. One of the 
forms had an oblong ovoid body about Ath of a line long and 4th 
of a line broad. tail-like rays formed half a dozen tufts, 
measuring in length about the width of the body. The latter 
