34 Mr. H. J. Carter on Freshwater Rhizopoda 
manner in which they are suddenly retracted, with or without 
the prehension of a particle of food—the latter seemingly pro- 
duced by the distending power which kept the semifluid sarcode 
in a ray-like form being suddenly withdrawn, when the sarcode, 
accumulating into a kind of drop at the end of the filament, 
incepts the particle of nourishment, and gradually, by amaleama- 
tive union, withdraws it and itself into the body of the animal. 
Interiorly the body so strictly accords with that of Huglypha 
that I have assumed that the vesiculee (which I have not yet seen 
in Cyphoderia) are in like manner situated opposite the constric- 
tion (for the convenience of emptying themselves there ?), and 
therefore have provisionally placed them im this position in the 
figure. In the posterior translucent part, which contains the 
nucleus and “ granules,” the latter will be observed to be oblong 
or elliptical, and not globular as they are in Euglypha com- 
pressa. 
The two figures of the test (d, e) on a smaller scale are given 
respectively, to show the acuminated variety, and for comparison 
in size with the rest of the figures. 
Sometimes the animal, instead of extending back to the pos- ° 
terior extremity of the test, is attached, a little distance from it, 
to the upper limb by a digital prolongation, in which I have seen 
a contracting vesicle fill and discharge itself. 
oe largest specimens that I have met with have been about 
2g, sooth broad, the aperture 54 ‘oth by 
ots th, and the scales =,4+,,th in diameter. 
_ A marine species (specimen?) has been described by |! Prof. 
Schultze under the name of Lagynis Baltica, out of which he 
has made the genus Lagynis (Organ. der Polythal. p. 56, 
tabb. 7 & 8. fig. 1). 
Actinopurys, Ehr. 
Actinophrys paradoxa, nu. sp. PI. II. fig. 20. 
Polymorphic; surface even, or furnished with capitate and 
actiniform tentacula, separately or together; capitate tentacula 
short, numerous, forming a villous surface over the body, re- 
eactile or extensile ; actiniform tentacula few in number, long, 
radiated, and much larger than the rest. Incepts crude mate- 
rial for food. Neither nucleus nor contracting vesicle seen. 
' Hab. Common in the freshwater tanks of the island of Bom- 
bay, from April to June inclusive. 
Size. About =1<th of an inch in diameter. 
Obs. This species has been designated from its changeable 
form—viz. at one time appearing without any tentacula, and at 
another with one or both kinds present. Figs. a, 6, e represent 
changes of form successively seen in the same individual ; and dis 
