49 
from that with the statocyst in regard to the regenerating process. 
The 25th. On the piece with the statocyst four new, smalls ribs 
have formed, with some few swimming plates. Two new small 
auricles have developed, while the two old auricles have been much 
reduced in size; also the lobe has become irregular and much 
reduced in size. The piece without the statocyst has no new ribs 
as yet. 
C. The 19th, 5 pm. Both pieces have the wound healed, 
but are somewhat irregular in shape, this being due to the fact 
that the cut was not quite clean, so that the two pieces were 
Ssomewhat lacerated. The 23rd. The piece with the statocyst has 
developed some irregular ramifications from the gastrovascular 
system. In the piece without the statocyst the two half lobes have 
Coalesced with their subtransversal edge, forming thus one lobe 
lying in the wrong way, parallel to the lips. The vessels of this 
lobe have united so as to resemble the usual arrangement of vessels 
in the lobes. — The 25th. The piece with the wrongly coalesced 
lobe has not begun to form the lacking ribs and meridional vessels 
The 4 old ribs are arranged symmetrically round the body. The 
animal with its four ribs and its single, wrongly placed lobe, looks 
most remarkable, and one has the impression that it does not 
know how to go about with the regeneration. The piece with the 
statocyst has developed four new small meridional vessels and ribs 
With small swimming plates. The two half lobes in this piece 
åre not coalesced. 
D. The 19th, 5 pm. The wound healed in both pieces and 
both quite vigorous. — The 23rd. The larger piece (the oral part) 
has formed a complete new apical system, only smaller than normal, 
especially the polar fields. A new infundibulum has formed, but 
it is still very small. The connection between the infundibulum 
and the peripheral vessels is reestablished and quite normal. The 
Smaller piece (the apical part) appears to be in the course of 
forming a new mouth and oesophagus. The 25th. The small, 
apical part decayed. The other part completely regenerated, only 
Vidensk. Meddel. fra Dansk naturh. Føren. Bd. 66. 4 
