Hypselodoris maculosa (Pease 1871)

Animal subcylindrical, elongate, narrow, smooth, flaccid, sub- pellucid. Mantle dilated in front and rounded behind, sides nearly parallel. Cervical tentacles large, sub-erect on stout bases, elongate oval, laminae deeply incised, retractile into simple cavities. Branchial star moderately developed, consisting of eight sub-erect, lanceolate, narrow pinnate plumules, connate at their bases, and retractile into a common simple cavity. Vent, a simple orifice. Labial tentacles small, finger-shaped. Foot elongate, narrow, truncately rounded and fissured in front; acutely rounded and projecting far beyond the body posteriorly. Color cream yellow, margined with fulvous, on which there is a series of abbreviate reddish lines, three irregular radiating, fulvous lines, extending from the front margin of the mantle toward the tentacles; lineated longitudinally with opaque white, line four, the two median encircle the branchiae and pass between the dorsal tentacles, which they partly encircle, the two lateral lines extend from the tentacles to the posterior end of the body; the spaces between the lines dotted with purple. Cervical tentacles pale, a broad brownish red zone just below the apex. Branchial plumules pale slate color tipped with red. Upper surface of the foot and under sides of the mantle lineated same as above, and dotted with violet, the former shaded with violet beneath and along the upper margin, and the latter marginated with dingy red. Length, one and a half inch. Habitat, Tahiti. Station, (under stones at low water. A.G.)

Hypselodoris maculosa is a species of sea slug or dorid nudibranch, a marine gastropod mollusk in the family Chromodorididae.