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The division of Vertebrata in which no allantois is developed. It includes amphibians, fishes, and lower forms.

The suborder of primates which includes the monkeys, apes, and man.

Same as Arachnida.

See Araneina.

A group of the Carnivora, that includes the bears, weasels, etc.

A group of Tunicata, often shaped like a two-necked bottle. The group includes, social, and compound species. The gill is a netlike structure within the oral aperture. The integument is usually leathery in texture. See Illustration in Appendix.

One of a body of devoted Jews who opposed the Hellenistic Jews, and supported the Asmoneans.

A class of Echinodermata including the true starfishes. The rays vary in number and always have ambulacral grooves below. The body is starshaped or pentagonal.

A division of the Cetacea, including the right whale and all other whales having the mouth fringed with baleen. See Baleen.

The order of Annulata which includes the leeches. See Hirudinea.

mind, free from all the deformities, defects, and blemishes seen in actual existence; an ideal or faultless standard or model.

One of the divisions of Crinoidea found fossil in paleozoic rocks; pentremites. They are so named on account of their budlike form.

A class of parasitic worms (Platelminthes) of which the tapeworms are the most common examples. The body is flattened, and usually but not always long, and composed of numerous joints or segments, each of which may contain a complete set of male and female reproductive organs. They have neither mouth nor intestine. See…

An order of ganoid fishes, including the sturgeons; -- so called on account of their cartilaginous skeleton.

the fossil species, like some that are recent, were attached by a jointed stem. See Blastoidea, Cystoidea, Comatula.

One of the Crinoidea.

Relating to the Ctenoidei. -- n.

A division of Carnivora, including the dogs, wolves, and foxes.

An order of Crinoidea, mostly fossils of the Paleozoic rocks. They were usually roundish or egg-shaped, and often unsymmetrical; some were sessile, others had short stems.

One of the Cystidea.