19 



angle, and do not again appear to inosculate with tlieir neigh- 

 bours. They alter in appearance, or position, or I'amificatiou 

 but slowly — the change which, indeed, is speediest of accom- 

 plishment is that of retraction, leaving the oval body a brown, 

 inert, not then readily recognisable mass. All this is quite 

 unlike the behaviour of a Gromia which, when quiet some 

 time upon a slide, pours forth an overflow of a clouded, fluid 

 sarcode, which gives off at all points irregularly branched 

 prolongations, copiously anastomosing and carrying a vigorous 

 floAV of granules in a current almost like a system of vessels. 

 It need not be remarked that the pseudopodia in our form 

 are quite a distinct sort of thing from the finger-like, ever 

 fitful pseudopodia of a Difflugian. That these forms, apart 

 from the tests, are quite distinct in themselves from Difllugia 

 on the one hand and from Gromia on the other, I could have 

 little doubt ; whether they rightly fall under Pleurophrys, as 

 I have indicated, may be a question. For some time I 

 imagined, as I now believe erroneously, that these forms 

 might fall under the genus propounded by Schlumberger^ — 

 Pseudodifllugia, — but that type is described as having a 

 membranous test, which, so far as 1 can see, would exclude 

 the present forms. I would be disposed to suggest that 

 Pseudodifflugia (Schlumb.) might really come nearer such a 

 form as the so-called Gromia Dujai'dinii (Schultze). 



Further, it appears to me that these differ in character 

 quite from the pseudopodia of Euglypha or Cyphoderia, not 

 to speak of the quite distinct kind of test. In these genera 

 and their allies the ^pseudopodia are few, unbranched, ex- 

 tremely slender and very lively, thrown out com]5aratively 

 rapidly, sometimes waved with no little vigour, drawn in 

 hurriedly, often showing a knob-like expansion or clavate 

 end during the act — all quite unlike the inert, comparatively 

 persistent, shrub-like tuft of thicker pseudopodia shown by 

 our forms. I think those who may be inclined to consider 

 the importance here attributed to the kind of pseudopodia, 

 and their appearance and behaviour, as too overdrawn, would 

 be at least obliged to admit, on looking over these forms in a 

 living state upon a slide for a length of time, that they possess 

 at least remarkable idios^iicrasies. 



The form shown in PL XX, fig. 1, is, I think, not un- 

 common ; but it is easy to pass it over, though, as will be 

 seen, by no means minute, as it may be taken almost for a 

 pellet of some kind of excrementitious matter, and, moreover, 

 it is shy of protruding its pseudopodia. The test, as men- 

 tioned, formed of a number of elongate and granular 

 * 'Annales des Sciences Naturelles,' 3rd ser., torn, iii, p. 256. 



