STUDr or PELO&ITXA PALUSTRIS. 375 



The JBacteria. 



(1) The definite proof that the rods are bacteria 



(a) by their motility and division, 

 (6) by their reactions, 

 (c) by successful culture. 



(2) The life-history of the bacteria, in fresh preparations and in 



culture ; aud 



(3) The identification of these as a new species, which it is 



proposed to name Cladothrix pelomyxce. 



The Refrmgent Bodies. 



(1) The proof that the refriugent bodies are proteid in nature. 



(2) That they have a definite relation to the bacteria, supplying 



them (a) with a point of attachment necessary for the 

 completion of their development, (h) probably also with 

 nourishment. 



The Animal as a whole. 



•(1) Some observations on the nature of the pseudopodia, which 

 tend to show that a recent classification of Ehizopoda based 

 on the characters of the pseudopodia, as hitherto known, will 

 not hold good as regards Pelomyxa. 

 (2) Observations on 



(a) the division of a single FeJomycca, 

 (6) the fusion of a divided portion with the protoplasm 

 of a second Pelomyxa. 



It will be convenient to consider these points in the order 

 given, taking first 



The Bacteria. 



The true nature of these was first definitely established by 

 me when working in my private laboratory in December, 1895. 

 It had appeared desirable to study Pelomyxa not only during 

 the summer months, but also during the winter, if possible, and 

 with this view Mr. Bolton was applied to for a supply of living 

 specimens. He was only able to supply seven individuals, 

 reporting them as " scarce at this time of the year." The first 

 question to which I directed my attention was the motility of 

 the rods, as the fact of motion had always been observed in rods 



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