integumentary

The integumentary folds over the nasal bones of the chick appear on or about the tenth day.

In my original specimens the integumentary spines had fallen, probably as a result of post-mortem decomposition.

The fourth is the sexually-developed stage, furnished with a simple hook-apparatus, and without integumentary denticles.

It differs from the larval form of P. tnioides in not possessing integumentary spines; moreover, it is a much larger parasite.

In this way contraction of the body, aided by the integumentary denticles, will secure their entrance into the nasal cavities.