NOTES AND MEMORANDA. 
377 
exists which leads from the cavity of the mid-gut to the 
integument. This cord consists of small endoderm-cells, 
rich ill granules, and the ectoderm-cells of the spot where it 
comes into contact with the integument are somewhat 
longer and poorer in granules than the neighbouring cells. 
There is, however, no trace to be seen of an orifice of in- 
vagination. 
In sections of somewhat older embryos one can observe 
that the cord becomes hollowed out, the hollowing process 
taking origin from the cavity of the mid-gut, and it is easy 
enough to convince oneself that it gives rise to the terminal 
gut. Accordingly I am in the pleasant position of being 
able to confirm your statements, in so far as that a cord 
exists which stretches from the integument to the gut, but, 
on the other hand, I consider that my view is confirmed, 
that the terminal gut is a derivative of the mid-gut. 
Your interpretation of this cord as a ^pedicle of invagi- 
nation ’ I am not able now, any more than before, to accept.’^ 
Dr. Rabl will explain his views and observations at 
greater length in Professor Gegenbaur’s ^ Morph. Jahrbuch.’ 
E. Pay Lank ester. 
Development of Muscular Tissue from Epiblast in the Mam- 
malia. — According to recent observations of Kanvier this ex- 
tremely important and unexpected fact has been established 
by him in regard to the muscular coat of the sweat-glands. 
The reader is referred to Ranvier’s notice of his discovery in 
the ' Comptes Rendus of the Acad, of Sciences of Paris,’ 
Dec. 29th, 1879. 
