Page:Smithsonian Miscellaneous Collections, Volume 85.djvu/96

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 * Canadia dubia Walcott, 1911, Smithsonian Misc. Coll., vol. 57, p. 119.

Original description.—"This species is proposed to include a small chaetiferous annelid not over 10 mm. in length. One specimen shows a bundle of very fine setae on each side near the head."

Four of the original specimens are illustrated.

Cotypes.—U. S. N. M., Nos. 83936a-d.

A tiny organism that appears as a slender tube with a termination surrounded by a ring of setae constitutes the material to which Doctor Walcott attached this name.

Holotype.—U. S. N. M., No. 83937.


 * Orthotheca corrugata Matthew, 1899, Trans. Roy. Soc. Canada, 2d ser., vol. 5, sec. 4, p. 42, pl. 1, fig. 3.
 * Orthotheca corrugata Walcott, 1908, Canadian Alpine Journ., vol. 1, no. 2, p. 246, pl. 1, fig. 11.
 * Wiwaxia corrugata Walcott, 1911, Smithsonian Misc. Coll., vol. 57, no. 5, p. 123, pl. 21, figs. 1-4.

A particularly fine example of this remarkable spined worm turned up in some of the more recent collections. Its picture is included since it may represent a relatively undistorted specimen with most of the plates retained.

Plesiotype.—U. S. N. M., No. 83938.


 * Ottoia minor Walcott, 1911, Smithsonian Misc. Coll., vol. 57, p. 129, pl. 22, figs. 5-6.

Original description.—"This species differs from O. prolifica in its proportionally more slender form when elongated and straighter outline both when elongated and contracted. The hooks are also much