. Alaska ... Natural history; Scientific expeditions. 172 RATHBUN horns slender, divergent, their outer margins almost longitudinal, their length along the inner margin about one eighth of the entire length of the carapace. Supraocular eave extending laterally not quite so far as in O. gracilis. Postocular spine narrow, as in O. gracilis, and directed a little more forward than in that species. The interantennular spine is curved a little more forward than in O. gracilis. Eyes a little stouter than in that species. Basal segment of antenna armed along its outer margin with one stout blunt subt
. Alaska ... Natural history; Scientific expeditions. 172 RATHBUN horns slender, divergent, their outer margins almost longitudinal, their length along the inner margin about one eighth of the entire length of the carapace. Supraocular eave extending laterally not quite so far as in O. gracilis. Postocular spine narrow, as in O. gracilis, and directed a little more forward than in that species. The interantennular spine is curved a little more forward than in O. gracilis. Eyes a little stouter than in that species. Basal segment of antenna armed along its outer margin with one stout blunt subterminal spine and three small spines, one of which is at the anterior angle, and along its inner margin with one or two tubercles. Outer maxillipeds as in O. gracilis. Lower surface pubescent. Chelipeds of the female of moderate size, one and a half times as long as carapace, subequal, shaped much as in O. gracilis. Inner surface of merus bordered by short blunt spines. Propodus slightly longer than merus, fingers and palm subequal, margins of palm subparallel, fingers fitting close together, denticulate. Ambulatory legs slender, diminishing gradually in length from the first to the fourth pair, the third pair being the length of the female cheliped. The dactyli are contained about one and a third times in their propodi. Chelipeds and ambulatory legs covered with long yellow hair, mixed with shorter and finer hair. Dimensions.—Length of carapace and rostrum mm,, width of carapace mm., width between tips of postorbital spines 13 mm., length of horn measured along the inner edge mm., distance between tips of horns mm. Type locality.—North of Rat Islands, Aleutian Chain, 270 fathoms [Albatross station 3785), one adult female. This species, by reason of the character of its orbits, maxillipeds, and trunk-legs, falls into the genus Oregonia, but differs from O. gracilis in its spreading horns, greater anterior breadth, different ornamentation of the basal anten
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectnatural, bookyear1901
