1979年 第17卷 第1期: 35~36
摘要： There is a broken egg from Ninghsia collected by the local geological part of this area. It is said to be occurred from the Creatopsidae bed detail place unknown.
The preserved part of the egg 36 mm. length and 33 mm. broad, its inner part is filled by red sands (see plates I-II) it is probable that the animal was already developed.
The surface of the egg is slightly white and slightly yellow with irregular pits.
The egg is certainly not that of Psittctcosaurus because of its older age. Also not that of Hesperonis, on account of its larger size. The belonging of chelonian is also excluded.
The following possibilities may be considered:
1. To a crocodile saying Alligator. But the sharp point of the egg of Alligator is not obvious, so that this is less possible.
2. To Ichthyornis. Its size is quite good for this genus but this bird is living in the water and not quite the same environment of Ninghsia. It is less probable to be considered here.
3. Belongs to a new form. But the specimen is too bad for erecting a new name.
All in all, there are many possibilities to discover new form in our country. The same is for eggs. In addition, the nest with egg is certainly not one but they nest and may also see， the producer of the eggs.