HUBRECHT. PU: 
early establishment of notochord and bilateral mesoblast; in Fig. 95 first in- 
dication of neurenteric pore which in Fig. 96 has travelled backwards conside- 
rably. — Fig. 96a, b and 96c. Two further stages of Tarsius development following 
upon those of Fig. 93—96. — Fig. 96a and 96b. Dorsal and ventral view of 
a blastodisk with about five somites. Ws Headfold seen from below; azz am- 
nionfold; @/ allantoidean tube, seen by transparency; @//J7 wide mouth of al- 
lantoidean tube in umbilical vesicle; zc neurenteric pore. — Fig. 96c. Later 
dorsal view, amnion nearly closed. sf connective stalk, ¢-w part of trophoblastic 
wall of blastocyst. — Fig. 97, 95 and 99. Longitudinal sections of the embryonic 
shields respectialy corresponding to Fig. 94 to 96. zr trophoblast, v7 ventral 
mesoblast, a@// allantoic tube (present, but not indicated in Fig. 98). fp proto- 
chordal plate; ch notochord; cz, o7 mc neurenteric canal; aa and ap anterior 
and posterior amnionfold; fev pericardium; % heart. Fig. 93 to 99 after Hub- 
recht (02). 
