-> 
and retains this homaxon form in the majority of spea — 
or Acia with four orders 
668 ` General Notes. [July 
Greene, entitled “ Spot in the Botany of California and Parts 
djacent.” Halsted’s Bulletin of the Iowa Agricultural 
College, from the Botanical Department, contains many things of - 
interest, from methods of work and study in the class-room and | 
laboratory to scientific descriptions of species. Dr. Vasey has | 
recently issued a pamphlet of sixty-three pages on the “ Grasses 
of the South.” It forms Bulletin No. 3 of the Botanical Division 
of the Department of Agriculture at Washington. Aside from 
its high value to the agriculturists of the South, it possesses & 
good ‘deal of botanical interest. The weeds of Southwestern 
Wisconsin have been listed and discussed by L. H. Pammel ina © 
twenty-page pamphlet, which has just appeared. 
ZOOLOGY. 
Radiolaria.—By far the most important contribution to ouf i 
knowledge of the Protozoa within recent years is the report on 
the Radiolaria of the “ Challenger” expedition, just published by 
Professor Ernst Haeckel, of Jena. A summary of these nearly two Ș 
thousand pages and one hundred and forty quarto plates is impos 
sible. We can but indicate something of their scope. Professor 1 
Haeckel now restricts the limits of the Radiolaria more than for © 
merly. As he now defines them they are “ Rhizopoda with cen- 
tral capsule and calymma,” for, as he says, their most impo 
character is the fact that the unicellular body is always in two 
main portions, an inner central nucleated capsular and an extra- 
capsular non-nucleated portion, the calymma, the two being sep? 
rated by a capsule-membrane. The majority have a skeleton, 
usually of silica, but frequently of organic substance (acant 
and this may take the most beautiful shapes imagina : 
present report embraces not only the Radiolaria alee by the 
= Challenger” collections, but is a complete monograph, of all 
ee a iaiia i iida ainiai iaaa 
ten years. The classification now adopted varies consider a ; 
Paes | 
Sub-Class I—Porulosa. Central capsule pricittivdly: a sphere, 
1, Peripylea, or reas Teas with six orders, and, 2; Asipa ql 
Sub-Class Il —Osculosa. Central capsule originally monaxot 
a or spheroidal), retaining this condition in mos species 
rane of central capsule with a single large osculum a 
the bees ofi its vertical main axis. Pseudopodia radiani frot 
the sarcode streaming from the osculum. - This also 
