DENDROSOMA RADIANS, EHRENBERG. 
141 
Dendrosoma Radians, Ehrenberg. 
By 
Sydney T. Ilickisoii, D.Sc., F.K.8., 
Beyer Professor of Zoology in the University of Manchester, 
and 
J. T. Wadsu'orlli. 
With Plate 10. 
Contents. 
PAGE 
Previous Observations .... 141 
On closely related Genera .... 143 
Material ...... 14o 
Food ...... 149 
Structure of tlie Cytoplasm . .1.51 
The Meganncleus ..... 152 
The Micronnclei ..... 157 
The Gemmulaj ..... lOl 
The Free-swim!uing Gemuiulaj and their Development . 164 
On Urnnla epistylidis .... 170 
On the Systematic Position of T r i c h o p h r y a, L e r n ae o - 
phrya, and Dendrosoma . . 174 
Summary of Results . .178 
Literature . .178 
Descrijition of the Plates .... 180 
Dendrosoma radians was first described by Ehrenberg 
in 1837 (9), but the figures he drew to illustrate its structure 
were not published until 1862 (11). In 1840 (10) he gave 
the following diagnosis of the species ‘^Dendrosoma 
radians: D. corpusculis conicis, ci’assis, mollibus lasvi- 
busque, alterne ramosis, rame apice incrassatis et tenta- 
culatis ” 
VOL. 54, PART 2. — NEW SERIES. 
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