Juvenile Rhamphorhynchus had relatively short skulls with large eyes .
The toothless beak - like tips of the jaws were shorter in juveniles than adults , with rounded , blunt lower jaw tips eventually becoming slender and pointed as the animals grew .
Juvenile Rhamphorhynchus had relatively short skulls with large eyes , and the toothless beak - like tips of the jaws were shorter in juveniles than adults , with rounded , blunt lower jaw tips eventually becoming slender and pointed as the animals grew .