THE FULUS TERRESTRIS. 417 
The liberation of the embryo is a remarkably slow process as 
compared with the escape of other animals from the egg. In 
Mr. Newport’s observations from ten to twelve hours elapsed 
before the body of the young J/yriapod was so far liberated 
as to remain only partially enclosed between the two halves of 
THE DEVELOPMENT OF Fulus terrestris. (After Newport.) 
1. The embryo on the rupture of the egg. 2, 3. Newly born Fzulus at the end 
of the first day. 4. A nine days’ old Galus. 5. Fudws on the seventeenth day. 6. On 
the nineteenth day. 7. On the twentieth day. 8. On the twenty-sixth day. 
the shell, being still attached to its interior by a cord (Fig. 2). 
So remarkable is its condition at this period that it strongly 
resembles the expansion of the germ in the seed of a plant 
rather than the evolution of a living animal. The embryo is 
perfectly motionless, and the bursting of its shell appears to be 
effected not by any direct effort of its own, since up to this time 
it has only acquired the form and external semblance of a living 
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