94. A. A. W. HUBRECHYT. 
way that most important larval organ, the allantois, all 
of a sudden originated, the organ by which nutrition and 
respiration is brought about, and which has become re- 
duced in man, the monkeys, and Tarsius to the connective 
stalk ? ” 
I doubt whether any embryologist will be found willing to 
adhere to this conception. 
I continue to cite from the Normentafel publication (07, 
p- 98) :—“ We may yet further point out that the very latest 
and very thorough going investigation of Peter (’05) describes 
and figures certain (Taf. I, figs. 9-11; II, figs. 14-18) details 
which also Strahl (81,82, ’83) and Corning (795, Figs. 4, 7, 9) 
had noticed before. According to these investigations, the 
allantois of Lacerta originates so very early as a solid Anlage 
in the hinder axis of the embryo (the cavity appearing only 
later, and yet later opening out into the gut) that the respec- 
tive relations could not have been different if the allantois of 
Lacerta, instead of being derived from a free outgrowth of 
the gut, had on the contrary evolved out of an earlier and 
solid connective stalk in the axis of the embryo. 
The relations between the allantois of Tarsius and Nyctice- 
bus are further yet illustrated by Figs. 2} * and aa!— 
of the Normentafel (?07). From them we learn that what 
is called the allantois of Tarsius belongs to the very oldest 
parts of the gut, and that the caudal gut (Schwanzdarm) 
only originates later as a protrusion directed dorsally. 
If we consider how matters stand in Nycticebus 92, 148 
and 239 (’07, Tabelle 2, 3, and 4), then we see that the 
hinder elongation of the gut, which we notice in the caudal 
extremity above the umbilical vesicle, might be considered to 
resemble remains of a connective stalk as much as anything 
else. The ventral portions are already strongly vascularised 
in Nycticebus 92, more yet in 148, and it can, for 239, be 
just as well said that the caudal gut develops, as in Tarsius, 
as a dorsal protrusion from the posterior (connective stalk) 
portion of the gut, as that one should conform to the current 
view and look upon the protruding allantois as a free vesicle 
