346 W. ARCHER, 



granules, almost looking like minute pearls. The authors 

 noticed the presence of a nucleus but seldom, still, indeed, in 

 the example under observation, three nuclei were present^; 

 they possess a central bluish nucleolus. The pseudopodia are 

 slender, pointed, free from granules, and unbranched ; they 

 are not equally distributed over the body-surface, but rather 

 confined to the extremities of the lobe-like extensions of the 

 body ; at these places they often take origin from a homo- 

 geneous protoplasm, free from granules and vacuoles. 



The locomotion is effected by the conjoint action of these 

 amoeboid protoplasmic processes and of the pointed pseudo- 

 podia emanating from them. This takes place pretty actively, 

 in one place a process being rapidly drawn in, along with 

 its bundle of pseudopodia, only to give rise to another at 

 another place. Unlike Vampyrella Spirogyree, this form 

 would appear to have no choice in selection of food. 



Examples were found, sometimes side by side, of two 

 different colours ; in one the pearl-like granules were per- 

 fectly colourless and pellucid, in the other of a light greyish 

 brown ; in other respects the two organism were alike, and 

 hence the authors were somewhat doubtful as to whether 

 these were really distinct species or merely accidental varie- 

 ties. Since they incline to the former view, as they never 

 met any other tones of colour or intermediate tints, they 

 describe them under distinct names. They were, further, 

 long doubtful as to the propriety of a new generic name, as 

 the form came so close to the description given by Cien- 

 kowski, for his Nuclearia.i 



But the following circumstances decided them not to 

 subordinate their form to Nuclearia. Though Cienkowski 

 says (for his form) "rich in vacuoles" that would not at all 

 characterise the completely " bubbly " parenchyme of Lep- 

 tophrys, due to the constancy in the size of the vacuoles. 

 Further, the specially characteristic equability in size and in 

 the distribution of the granules, and the peculiar flow of the 

 body into numerous lobes, find no mention in Cienkowski^s 

 description; it may be assumed, therefore, that these charac- 

 teristics are wanting in Nuclearia. Again, the contractility 

 of the vacuoles, and the peculiar mode of sucking in its 

 nutriment in the latter, and the much larger size of the 

 nuclei, are further striking points of difference. 



In conclusion, the authors touch upon the question as to 

 the possible identity of their Leptophrys ciner-ea with Cien- 

 kowski's Vampyrella vorax. But as the latter author does 



1 ' Archiv f. Mikrosk. Anat./ Bd. i, p. 225. 



