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Its text is peppered with scientific language – sebaceous gland, papilla, uniserial, vacuolated, cortex, cuticle.

Unifarious, ū-ni-fā′ri-us, adj. with the parts arranged in one rank, uniserial.

Uniserial, ū-ni-sē′ri-al, adj. placed in one series.—adv.

Finally, in the latest family, the Monograptidae, the branches are theoretically reduced to one, the polypary is uniserial throughout, and all the thecae are directed outwards and upwards.

In the genus Dendrograptus the gonothecae open within the walls of the ordinary thecae, and the branches present an outward resemblance to those of the uniserial Graptoloidea.