254 MALL. [Vor. XIX. 
the body there is a large cavity filled with round cells. Near 
the attachment to the amnion there are several such “‘abscess- 
like’ masses within the embryo. 
The pigment dots, on account of their position, undoubt- 
edly represent the eyes of the embryo. Each forms a small 
sac immediately below the skin filled with large free pigment 
cells. Deeper within the “head” of the embryo a band of 
pigment cells connects the two “eyes,” as may be the case if 
we consider these cells as the connecting optic nerves. 
No. 253. 
~ 
Ovum, 35 x 30 X 15 mm.; embryo, 4 mm. 
Professor Broédel, Baltimore. 
Chorion and villi are somewhat hyaline, with indications of 
blood-vessels within them. Ammnion, which measures Ig x 
Fic. 253.—Embryo within the chorion. X 138 times. The collapsed bag 
behind the embryo is the amnion. 
13 X 13 mm.,, is attached at one point, has hyaline walls and 
does not contain the embryo. 
The embryo is a swollen infiltrated specimen of the third 
week, with no brain and little of its spinal cord left. The 
