18 
because the animals which possess it do not differ in other respects from 
those in which it is wanting. He has watched it, also, detaching itself from 
the body, and thinks it to be a secretion from the ectosarc — not, however, 
to be viewed in the light of a cuticular formation — being stiff, and adhering 
as a cap-like appendage to the ectosarc. He thinks it might serve either as 
a point of leverage for locomotion, or as a prehensile organ to assist in taking 
up food. 
The other species require but brief description, and may be quickly 
dismissed. 
Amoeba brevipes — rare ; its small spherical body filled with a granular 
substance composed of darkly-glancing particles. Its sarcode, in the interior 
of which are vacuoles, is not differentiated, but it projects from its surface 
short, stumpy, transparent rays. Its movements are sluggish. It multiplies 
by cleaving of nucleus and body. 
Amoeba granifera — ^~ inch. Has a creeping motion like that of water 
Amcebse. Its sarcode is differentiated, the ectosarc being soft and transpa- 
rent, the endosarc granular, with included nucleus and vesicle. Probably 
immature —the young form of some other species. 
Amoeba gracilis — ^ inch. Wormlike in aspect with a villous appendage 
of a disc shape at one end (sucker?). The villi disposed round this disc 
extend or contract, and fix themselves on the glass slide (pseudopodia. ) In 
the centre of the disc-like appendage is a vacuole. It has a nucleus in its 
body. 
Besides these species Dr. Greef found an Amoeboid animal for which he 
proposes the name of Amphizonella, and considers that it should constitute 
a new genus, inasmuch as, besides other peculiarities, it differs from the 
naked-bodied Rhizopoda in being enveloped in a thin but complete mem- 
-branous covering. 
The first species, Amphizonella violacea is a spherical animal of about ~ 
Inch in diameter in its adult state. The membranous investment has a 
distinct outer and inner contour-line, and shews reactions when heated with 
Acid Acet. and Ac. Sulph. dil., which differ from those exhibited by the inner 
barcode. Under pressure, the capsule bursts, and through the rift a different 
inner mass streams out. This interior mass is deeply coloured with a dark violet 
pigment, with which a yellow pigment is intermixed, while the external 
capsule is clear and transparent. On account of the dark colour of the pigment 
little else of the contents is to be seen with exception of a large nucleus -g~ 
inch, and numerous small vesicles (vacuoles) — the nucleus being less colored. 
The violet pigment is very sensitive to reagents, being immediately decom- 
