of Single Hypogastric artery in the Human Foetus. 327 
side is represented by two small branches of the common iliac 
artery so that the umbilical artery does not arise from the 
internal iliac vessel as is normally the case. On the right side 
there is no hypogastric nor umbilical artery, and it therefore 
appears that the vessel on this side of the body has failed to 
appear or else has been suppressed. 
It should be noticed that the superior mesenteric artery in 
specimen A is distinct. There was a large exomphalic tumour 
containing various intestinal loops, including the caecum and 
appendix. 
II. Specimen E is a good deal smaller than specimen A, and 
its age is estimated as about six months. From vertex to coccyx 
the length is 200 mm., and the specimen after several years 
immersion in alcohol, weighed 801 gm. The dimensions of the 
head are: maximum length 102 mm.: maximum breadth 71 mm.: 
maximum “ horizontal ” circumference 280 mm. Neither head 
nor cerebrum is malformed, and herein lies a contrast with 
specimen A. No external genitalia are present. From the 
external conformation the diagnosis of sex is therefore impossible, 
but the intra-abdominal sex-gland shews ovarian characters (though 
these are modified), and the sex is thus shewn to be female. 
Both right and left upper limbs and the left lower limb are 
much deformed, and their general appearance is shewn in the 
accompanying photograph (Plate xii, Fig. 3). The lower limbs 
have been abnormally rotated, torsion having occurred in the same 
sense as in the upper limbs. This is most marked in the footless 
left limb, and in both, the flexor muscles of the knee are on the 
anterior and not the posterior aspect of the thigh while the leg 
bends forwards at the knee, and thus resembles the forearm at the 
elbow. The right leg is abnormal onty in respect of this unusual 
rotation, the degree or extent of which is less than in the left 
leg, and in making the photograph represented in Fig. 3, this 
limb was drawn as nearly as possible into the normal position. 
Thus is explained the apparent discrepancy between the appear- 
ances seen in Fig. 3, and the account in the text. Other skeletal 
peculiarities are revealed by the skiagram reproduced in Plate xii, 
Fig. 4. 
The anterior abdominal wall is not abnormal and no hernial protrusion 
exists. The umbilical vein is traceable as the ductus venosus to the inferior 
vena cava. The thymus body is unusually small and the heart has a bifid 
ventricular apex. The spleen is accompanied by two small accessory bodies. 
Remnants of the suprarenal bodies can be identified, but no kidneys can be 
found. 
Sex-glands (female) are present but there is no bladder. 
The intestine was interrupted at several points and ends 
blindly, the anus being imperforate. 
