105 
den Schwund des Ectoderms und der Entodermhôhle jede embryonale 
Grundlage einer bestimmten Formbildung zerstort wird, bleibt im 
Grunde ebenfalls ein unorganisirter Haufen von gleichartigen Zellen 
(Entoderm) zurück, in welchem durch histiologische Differenzirung 
einzelner Zellengruppen sich die Organisation des Schwammes ent- 
wickelt. Der Inhalt einer Gemmula verhält sich also in den Bedin- 
gungen seiner weiteren Umbildung genau so wie die Zellenmasse einer 
metamorphosirten Larve mit noch indifferentem Entoderm. 
3. Some observations opposed to the presence of a parenchymatous or 
intra-cellular digestion in Salpa. 
By Dr. Ch. S. Dolley. 
eingeg. 27. October 1884. 
During the year I hope to make public the results of my winters 
work on the histology of Salpa, which I have carried on concurrently 
with a study of the budding of Salpa, by Prof. W.K. Brooks, at 
whose suggestion and under whose supervision I have pursued my 
studies. I desire, however, preliminary to giving the results of my 
work in full, to make a few remarks in reference to statements re- 
cently made by Dr. A. Korotneff! of Moscow, which I am unable 
to confirm and which I consider erroneous in so far as they indicate 
the presence of a huge amoeboid cell or plasmodium occupying the 
oesophagus and stomach of Salpa. Korotneff speaks as follows in 
regard to this point. »In the stomach (of young Anchinia) I found a 
large cell, which gradually enlarged, and at last filled the entire lumen. 
Later it is seen to be no longer a single cell, but several, not accumu- 
lated in a mass, but in rows one next the other, not only in the stomach, 
but in the oesophagus, portions extending as well into the intestine 
proper. These ‘cells arise through a separation of the cells of the 
stomach wall ; or more correctly, it is only the first cell which is sepa- 
rated and which later subdivides itself. A section of the stomach of a 
fully developed Anchinia shows the wall of the stomach as consisting 
of two layers; the inner formed of cylindrical cells the outer of spindle- 
shaped cells. The lumen encloses a large cell with afround and distinct 
nucleus. In the lower half of the oesophagus as well as in that portion 
of the intestine which lies next to the stomach, the same contents and 
structure are to be observed. The plasma of this inner cell is coarsely 
granular, and contains the various remains of a completed digestion. 
1 Dr. A. Korotneff, Über die Knospung der Anchinia. in: Zeitschr. f. wiss. 
Zool. 40. Bd. 1. Hft. 1884. 
