OWSJANNIKOW describes the ganglion cells of the lobster (1. c. 
1861 p. 139) as having »un contenu assez liquide« in which he has 
observed fibrillæ, »qui semblent pénétrer dans le milieu de la celluie.« 
The ganglion cells of the Molliisca he describes as having a semi- 
fluid protoplasm which »erst nach dem Tode fest wird« (1. c. 1870 
p. 681). Here, he mentions no fibrillæ. 
ChÉRON (1866) describes (in Cephalopoda) apolar, uni-, bi- and 
multipolar ganglion cells having granular or homogeneous contents. 
In the »ganglions de bras« he describes, for instance: »des cellules 
unipolaires å contenu granuleux, et des cellules bipolaires ou tri- 
polaires å contenu liquide sans granules.« 
ClaparÉDE says (1. c. 1869 p. 593): »Die Zellenkorper bestehen 
aus einem kornigen Protoplasma olme erkennbare Membran. « 
SoLBRIGs opinion (1872) was that, the concentric fibrillar appear- 
ance was a postmortem one and was, partly, artificially produced 
by folding of the cell-surface etc. According to his view, the proto- 
plasm of the cells, as well as of the processes, is a homogeneous 
or granular »fest-weiche« substance. A great many other writers 
are, also, of the same opinion. 
Stieda (1874) says in his description of the Cephalopoda, that 
the protoplasm of the ganglion cells have, in fresh state, an extremely 
minute granular appearance ; »an den Zellen der Schnittpraparate lasst 
sich eine homogene Grundsubstanz erkennen, in welcher ausserst 
feine Kornchen eingestreut sind.« The processes have the same 
appearance (1. c. 1874 p. 92). 
Even Hermann (1875) is no adherent of a fibrillar structure of 
the cell-protoplasm ; in his opinion it is rather granulous or homo- 
geneous.^) 
YuNG (1878) describes the protoplasm of the ganglion cells as 
being fluid, and homogeneous or granular. 
Bellonci (1878) describes the protoplasm of the large 
ganglion cells of Squilla, as having »un aspetto finamente 
1) According to Hermann the protoplasm of the cells consists of two sub- 
stances: »Die eine umfasst weitaiis seinen grossten Theil, erscheint gleichmåssig 
homogen, oder in einigen Fallen feingekornt, nimmt iiberall die åusseren Schichten 
des Zellkorpers ein, gibt ihm seine Gestalt, und hildet allein den Fortsat2.« .... 
»Die andere Substanz erscheint als aus groberen Kornern bestehend und ist 
in ungleich grossen Massen um den Kern hemm gelagert* (1. c. 1875 p. 30). 
The processes of the cells have, consequently, in Hermanns opinion a homogeneous 
structure. 
