88 Mr. H. J. Carter on Freshwater Rhizopoda. 



^r, pseudopodia ; A, body of the animal ; i, nucleus and nucleolus; 

 k, " granules," (?) globular in shape ; I, I, vesiculae in situ. 

 Fig. 26. Difflugia elliptica, n. sp., provisionally so named : a, broad side 

 of test ; b, posterior extremity viewed from above, showing its 

 compressed form ; c, pseudopodia. Indian specimen. 



Plate II. 



Fig. 14. Arcella vulgaris, Ehr., magnified : a, test ; b, form of plates ; 

 c, aperture ; d, animal attached to the test by dentiform pro- 

 cesses ; e, e, the two nuclei situated opposite each other ; /, vesi- 

 culae in great plurality ; g, lateral view ; h, form of pseudopodia ; 

 i, lateral view of more elevated variety ; k, pseudopodia ; Z, hori- 

 zontal view of facetted variety ; m, lateral view of the same. 



Fig. 15. Arcella patens, Clap. & Lachm. (mihi), magnified : a, under surface 

 of test ; b, body of animal ; c, nucleus ; d, vesicula ; e, upper view; 

 /, lateral view ; g, size of test on the scale of ^th to gi gth of an 

 inch (for comparison). 



Fig. 16. Difflugia Bombayensis, n. sp., magnified: o, grains of quartz; 

 b, cancellated structure of the test beneath, in circles ; c, pseudo- 

 podia. 



Fig. 17. EuglypTia alveolata, Duj., magnified; furnished with twelve hairs : 

 a, form and arrangement of body-scales, more magnified ; b, ser- 

 rated edges of apertural scales, as seen under ith-inch focus. 

 hoc. South-east coast of Devon. 



Fig. 18. Cyphoderia margaritacea (Schlumberger), magnified, on the scale 

 of -iVth to ^ymyth of an inch : a, test ; b, form of scales ; c, beaded 

 form of apertural margin ; d, test less magnified, viz. on a scale 

 of ^th to g-^th of an inch (for comparison) ; e, ditto, acuminated 

 variety ; /, /, pseudopodia, more or less branched ; g, h, forms 

 under retraction, the latter incepting a particle of food at its ex- 

 tremity ; i, body of the animal, containing fragments of nutritious 

 matter in progress of digestion ; k, nucleus, surrounded by I ob- 

 long " granules" (?) ; m, vesicula; opposite the constriction of the 

 body, situated as in Euglypha (assumed position). 



Fig. 19. Amoeba monociliata, n. sp,, magnified ; under two dififerent forms : 



a, cilium ; b, villous appendage on posterior extremity. 



Fig. 20. Actinophrys paradoxa, n. sp., magnified: a, simple form; b, the 

 same, covered with capitate tentacula, the capitate portion not 

 visible, probably from their shortness and evenness in length ; c, 

 ditto, with both capitate and actiniform tentacula ; d, ditto, with 

 the capitate portion now become visible, and these tentacula of 

 different lengths. The figures a, b, c represent changes witnessed 

 successively in the same individual ; d represents another indivi- 

 dual, assumed to be of the same species, with the capitate cilia 

 fully developed : this is the commonest form, perhaps because 

 most easily recognized. 



Fig. 21. Actinophrys Eichhornii, 'Ehr., magai&eA; scale |thtOg^th of an 

 inch (for comparison) : a, a, investing membrane seen extending 

 up the actiniform tentacula,also covering the contracting vesicles; 



b, vacuoles with which the body is densely charged ; c, the same, 

 more magnified, showing the granules within their interior, which 

 are so remarkable for their active motion (probably owing to that 

 of the protoplasm in which they may be suspended) ; d, actini- 

 form tentacula, formed of the granular protoplasm of the paren- 

 chyma only, but sheathed apparently throughout with the in- 

 vesting membrane (I did not see any of the vacuoles in the 



