164 071 the Bhizojjodal Fauna. [iraSriTiff 
aggregated, as in the tests of Liiuola and Astrorhzia, which, when 
broken open, are found to be filled with aggregations of minute 
yellow spherules, not enclosed in any distinct envelope. These are 
supposed by the author to be reproductive gemmules formed by the 
segmentation of the sarcodic body of a Ehizopod, in the same man- 
ner as zoospores are formed in protophytes by the segmentation of 
their endochrome. Of such segmentation he formerly described 
indications in the sarcodic body of Orhitolites ; and corresponding 
phenomena have been witnessed by Prof. Max Schulze. But in 
another set of cysts, of similar materials but of firmer structure, bodies 
are found having all the characters of ova, with emhryos in various 
stages of development. In none of these, however, does the embryo 
present characters sufficiently distinctive to enable its nature to be 
determined ; and the hypothesis of the Foraminiferal origin of these 
bodies chiefly rests upon the conformity in the structure of the wall 
of the cysts with that of the tests of Lituola and Astrorhiza, and 
upon the improbability that such cysts should have been constructed 
by animals of any higher type. 
