530 CONCLUSIONS. 
the waves, the last part which is visible of it, is the end of the 
tail (fig. 20). Generally, however, it happens that the swimming 
animal grows gradually smaller and smaller to the eyes of the 
observers, and at last disappears in the distance to be seen no more. 
3. Voice. —In none of the reports gathered in this volume there 
is a single notice about the animal’s voice. It is probable that the 
individual gripped by the spermwhale (144) uttered a sound which, 
however, was not heard amidst the tremendous noise, made by 
the two animals fighting. 
d. Generation, Growth. 
I am sure that nobody will believe any longer, as was the case 
in 1817, that sea-serpents are oviparous. Animals with a hairy skin, 
safe the Monotrymata, are viviparous, consequently sea-serpents are 
viviparous. | 
Though Ponropripan believes that sea-serpents “seek the other 
sex most probably in July and August” (p. 133), and that “July 
and August are its paring time’ (p. 129), I am satisfied that 
March and April must be taken as their months of amours, and 
that July and August are the months of whelping. 
A new born pup most probably has a length of about twenty 
feet (14). 
It seems that the months during~ which two sea-serpents were 
seen together are July and August, probably also September (23, 
27, 66, 72). It would seem, therefore, that a male remains in the 
neighbourhood of his companion during her pregnancy and probably 
also during the first month or during the first two months of the 
new-born young. 
It seems also that the females are much smaller than the males, 
as the pups are comparatively very small, and as twice one of the 
two which were seen together is described smaller than the other 
(23, 66). 
We have already met with two instances in which the head of 
the individual is delineated or described as having a hollow at its 
top (60, fig. 30). I am satisfied that these were two males not 
yet full-grown, showing the two cushions of their enormously 
developed masticatory muscles, which were not yet closed in the 
centre of the top of the head, and whose skulls therefore, could 
not show the occipital and medial crests. 
