244: 
comes out of the psorosperms, up to the complete Gregarina, 
which may attain a length of sixteen millimeters. 
In the month of May of the past year I found in the 
small intestine of the lobster little protoplasmic masses en- 
tirely naked, devoid of nucleus as well as of membrane, and 
which, in respect of their finely granular aspect, their con- 
tinual changes of form, and their entire constitution, may be 
compared with the Protameba agilis or the Protameba 
primitiva of Haeckel. They differ from these solely in the 
fact that fine molecular granulations are met with even at the 
periphery of the body, and in the fact that the forms scarcely 
depart from those of a globular body more or less irregular 
at its surface (Pl. XII, figs. 1, 2, and 3). I have never 
seen pseudopodia projected to a distance. 
As we shall see, these little protoplasmic globes are the 
point of departure of the development of the Gregarine ; 
they are distinguished from true Amebe, which always possess 
a nucleus, and often also a contractile vacuole by the absence 
of both one and the other. From a morphological point of 
view these little protoplasmic globes, devoid of any nuclear 
structure, are true Gymnocytods. 
By the side of these little living masses devoid of all or- 
ganization, we find here and there other little protoplasmic 
globes, which only differ from the first in the fact that they 
have lost the faculty of moving themselves and of changing 
their form (fig. 4). On the surface is observed a somewhat 
thick layer of a brilliant protoplasm, highly refringent, per- 
fectly homogeneous, and absolutely devoid of all granulation, 
whilst the central protoplasmic mass holds numerous molecular 
granulations in suspension of which some appear as points of 
the extremest tenuity, whilst others have dimensions appre- 
ciable by the microscope. These last granules are probably 
only nutritive elements. I have been able to establish, as 
will be seen further on, the greater fluidity of the central 
granular matter; but the line of demarcation between the 
peripheral perfectly homogeneous zone and the central gra- 
nular mass is not sharp and defined; the small protoplasmic 
mass is not delineated by a membrane properly so called, but 
rather by a layer of condensed protoplasm, if one may thus 
term that which acts as a membrane in such a way as to 
preserve the spheroidal form of the cytod. 
In consequence of this tendency to the separation of the 
protoplasmic mass into two distinct layers, a cortical substance 
and a medullary substance, these globes rise to a position 
above the Monera. The latter never exhibit this separation, 
although it is general in the other lower Protista. 
