330 Scientific Intelligence. 
they nourish themselves like true aca by the absorption of 
fixed organic material; as soon, however, as they contain a sufi- 
ans amount of Algz they are autshied ‘like true plants by the 
assimilation of inorganic material. henever in consequence of 
a lack of light the Alge cannot perform their proper function 
they Na host-animals) must again nourish thems oo like 
anima ‘: 
BoranicaL NEcROLOGY. 
Tuomas Porrs James.—With sorrow we have to announce the 
decease of one of our oldest botanists, which has taken place just 
when the fruits of long and laborious studies were nearly ready 
to be gathered. To Bryologists Mr. James’ intimate acquaint- 
ance with mosses and his devotion to their investigation were not 
unknown. But the Hees of the Manual of North American 
Mosses, by the two re eg esquereux and James, for whic 
we were waiting, woul t once have resulted in wide apprecia- 
tion of devoted services. Lae t us hope that the Bee vs of this 
leaves Leo Pana FS 
r. James died, at his residence in Cambridge, on the 22d of 
February, 1882, in the seventy-ninth year of his age. In his usual 
r. James came of a HAN stock of Penn colonists. His 
maternal ancestor, from whom bis baptismal name was derived, 
was mas Potts, of Colebrook Dale, and his great great- 
grandfather, David J ames, oualenad from Radnorshire, in 1682, 
and settled at Radnor, Pennsylvania, near P Re where 
the ee ect of this notice was born , September 1, 1803, Circum- 
rena prevented him obtaining a collegiate cdation at Prince- 
ton, for which he was preparing, and directed him to business 
ey hos He became a wholesale druggist, aed paieiod on the busi- 
- ness with success in Philadelphia for forty years, 29, Sattnige ~ 
while his leisure to botany, for which he had a fondnes 
early youth. In December, 1851, he married Isabella Batcualaer, 
Cambridge, Mass., a lady of similar scientific tastes and of 
varied accomplishme nts, who with their four children survives; 
and in 1869 the family removed to Cambridge, where the remain- 
der of his life was sed. In Philadelphia he was an active 
member of the leading scientific societies, especially of the old- 
