Preservation is poorest in scales along the line of the neural and haemal arches; therefore lateral line scales are rarely preserved.

This state of affairs has no antecedent improbability about it, since in the Vertebrata the coelom is unquestionably confluent with the haemal system through the lymphatic vessels.

Before throwing tail and hinder part of body away, note the myotomes of body wall, the notochord and vertebral body, neural canal, and, in the tail, the haemal canal.

Now he saw far above him the backbone of the apparatus and its big ribs, "like the neural and haemal canals," said Kurt, who had dabbled in biology.

A. Eighth cervical vertebra of Wild Duck viewed on haemal surface.