1909-10.] Morphology of the Manus in Platanista gangetica. 509 
(5J inches). The free border was truncated and festooned owing to slight 
projections produced by the tips of digits ii to v. The radial or anterior 
border 24*3 cm. (9J inches) was convex, and the relatively short pollex was 
parallel and close to it. The ulnar or posterior border 15*5 cm. (6J inches) 
long was almost straight (fig. 1). 
The young St Andrews Platanista measured in a straight line from the 
tip of the snout to the notch in the tail 89*5 cm. (35 \ inches) : from the tip 
to the angle of the mouth 20 cm. and to the base of the flipper 31*5 cm. Its 
girth round the head at the blowholes was 40*5 cm. and at the umbilicus 
52 cm. Dr Anderson in his elaborate memoir gave in Table I. the measure- 
ments of eight specimens: the longest, a female, measured 99T2 inches 
(252 cm.), the skull and spine of which were together 90*85 inches (231 cm.)* 
In the same table the length of a foetus was given as 27*75 inches, that of a 
young male 56 inches, and a young female 59 inches. In dimensions the 
St Andrews young animal was 7J inches longer than the foetus measured 
by Anderson, and the relative length of its head and body to that of the 
longest Platanista in his Table I. was as 35 to 99 inches. The jaws in the 
St Andrews specimen had a formidable armature of simple acuminate teeth, 
which, after projecting through the gum, varied in length from 20 mm. 
near the tip of the jaws, to only 3 mm. near the back of the dentary 
arcade ; but it was obvious from slight projections in the gums that the 
most posterior teeth had not yet erupted; no hairs projected from the skin 
of the tips of the jaws.f No trace of an umbilical cord was seen, and the 
specimen was obviously beyond the foetal stage. 
The flipper in the St Andrews young specimen in its general form resembled 
that above described, though on a smaller scale. Its length from the base 
to the truncated free border at the tip of digit ii was 15 cm. (5*9 inches) ; 
along the radial convex border 16*5 cm. ; along the ulnar straight border 
11*5 cm.; whilst the greatest breadth was 8 cm. (fig. 3). The tegumentary 
structures were so thin that the outlines of the bones of the fore arm and 
hand could be readily seen without a dissection. 
Radiograms of the flippers of Dr Annandale’s and Professor MTntosh’s 
specimens were taken for me by Mr E. J. Henderson of the Anatomical 
Museum, and illustrations have been produced from a selection of them. 
The extent of ossification and the relative position of the bones could there- 
fore be efficiently studied in their natural undisturbed position. The hands 
* He stated on p. 432 that the length of an aged female was 9^ feet, whilst that of his 
largest male with a mature skeleton was scarcely 7 feet. 
t The foetus in utero figured by Anderson in plate xxxi. showed columnar ridges on 
the gums, marking the outlines of the teeth which had not cut the gums ; also a few 
scattered hairs projecting from the skin of the tip of the jaws. 
