. Bulletin - United States National Museum. Science. THE SPIDER CRABS OF AMERICA 71 KET TO THE SPECIE9 OF THE GENUS OREGONIA A*. Rostral norns long, parallel, contiguous. Supraorbital arch prominently angled at posterior end. Body, including rostrum, subtriangular. gracilis, p. 71. A*. Rostral horns short, divergent. Supraorbital arch not prominent nor angled posteriorly. Body suboblong bifurea, p. 79. OREGONIA GRACILIS Dana DECORATOR CRAB Plates 24 and 25 Oregonia gracilis Dana, Amer. Journ. Sci., ser. 2, vol. 11, 1851, p. 270 (type- locality, Puget Sound; cotype, Cat. No. 1232, M. C. Z.); U.
. Bulletin - United States National Museum. Science. THE SPIDER CRABS OF AMERICA 71 KET TO THE SPECIE9 OF THE GENUS OREGONIA A*. Rostral norns long, parallel, contiguous. Supraorbital arch prominently angled at posterior end. Body, including rostrum, subtriangular. gracilis, p. 71. A*. Rostral horns short, divergent. Supraorbital arch not prominent nor angled posteriorly. Body suboblong bifurea, p. 79. OREGONIA GRACILIS Dana DECORATOR CRAB Plates 24 and 25 Oregonia gracilis Dana, Amer. Journ. Sci., ser. 2, vol. 11, 1851, p. 270 (type- locality, Puget Sound; cotype, Cat. No. 1232, M. C. Z.); U. S. Expl. Exped., vol. 13, Crust., part 1, 1852, p. 106; atlas, 1855, pi. 3, fig. 2a-c.— Rathbun, Proc. U. S. Nat. Mus., vol. 17, 1894, p. 59; Harriman Alaska Exped., vol. 10, 1904, p. 171.—Doflein, , K. Abh. Bayer. Akad. Wiss., Ivlasse, vol. 29, 1899, p. 183.—Holmes, Occas. Papers California Acad. Sci., vol. 7, 1900, p. 19.—Way, Puget Sd. Mar. Sta. Publ., vol. 1, 1917, p. 369, text-fig. 20.—Schmitt, Univ. California Publ. Zool., vol. 23, 1921, p. 198, text-fig. 122. Oregonia hirta Dana, Amer. Journ. Sci., ser. 2, vol. 11, 1851, p. 270 (type- locality, Puget Sound; type not extant); U. S. Expl. Exped., vol. 13, Crust., pt. 1, 1852, p. 107, pi. 3, fig. 3a-b. Oregonia longimana Spence Bate, Proc. Zool. Soc. London, 1864, p. 663 (type-locality, Esquimalt Harbor, B. C; type in Brit. Mus.); Lord's Naturalist in Brit. Columbia, vol. 2, 1866, p. 267, plate facing p. 262, fig. 5. Diagnosis. — Rostral horns long, parallel, contiguous. Supraorbital arch prominently angled at posterior end. Body, including rostrum, subtrian- gular. —Surface cov- ered with setae and bunches of longer hairs. Carapace un- evenly tuberculate; cardiac region somewhat depressed; hepatic region with a tuber- culate prominence below the FIG. 19.—Oregonia graci- margin, Postorbital spine re- us^ (17065), , niotc from the ejc, loug,kuceo- late, directed ablique
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