MEMOIRS. 



On some Freshwater E-hizopoda, New or Little-Known. 

 By William Archer. 



{Continued from vol. is, 2s^.S., p. 34.) 



In Diplophrys the body seems bounded by a definite in- 

 tegument very like the appearance in that respect of the form 

 met with in our waters, which I Avould, as yet, identify as 

 Plagiophrys spherica (Clap, et Lachm.) ; and the places for 

 the passage forth of the tufts of pseudopodia are indicated, 

 in examples met with in which they are not projected, by 

 a little rounded dei3ression. The internal amber-coloured 

 body sometimes appears as if fractured into a number 

 of portions, but these still clustered in pretty nearly the 

 same spot. The region beyond the amber-coloured globule 

 is pellucid and of somewhat bluish tint, with a few colourless 

 granules. 



Diplophrys (Barker) might then, to a certain extent, be 

 said to bear a parallel relationship to Plagiophrys (Clap, et 

 Lachm.) {PL spherica), somewhat similar to that of Amphi- 

 frema (mihi) to Pleurophrys (Clap, et Lachm.). 



But Greef is disposed to suggest that the yellow bodies 

 of his Acanthocystis spinifera, escaping forth therefrom, each 

 surrounded by a hyaline halo or rather hyaline vesicle, have 

 the power to put forth, and indeed actually do put forth, at 

 opposite poles, those radiating tufts of delicate pseudopodia 

 depicted in his figures ^26, 27, and 28 — in a word assume 

 the characteristics of Diplophrys Archeri (Barker). Greef 

 seems further inclined to regard the form figured in his Fig. 

 25 as but a modification of the same, and his Fig. 29 as but 

 great consociated groups of the former. But as before men- 

 tioned, I cannot but regard his Fig. 29 as representing one 

 and the same thing as my Cystophrys ocidea. 



Now, one or two considerations appear to me to be opposed 

 to Greef 's view. The yelloAV oil-like granules, Avith the 



VOL. X. — new ser. h 



