. Bulletin - United States National Museum. Science. 272 BULLETIN 152, UNITED STATES NATIONAL MUSEUM UPAESTHESIUS LEEANUS Rathbun Plate 112 Lipaesthesius leeanus Rathbun, Proc. U. S. Nat. Mus., vol. 21, 1898, p. 585, pi. 42, figs. 4 and 5 (type-locality, southern part of Gulf of California, 10 fathoms; type. Cat. No. 21581, ). Medaeus rugosus Boone, ^oologica, vol. 8, 1927, p. 201, text-fig. 70 (type-loca'ity, off Gardner Bay, Hood Island, Galapagos Islands; type in Mus. N. Y. Zool. Soc). Diagnosis.—Basal antennal article terminating at prolongation of front. Surface of carapace and ap
. Bulletin - United States National Museum. Science. 272 BULLETIN 152, UNITED STATES NATIONAL MUSEUM UPAESTHESIUS LEEANUS Rathbun Plate 112 Lipaesthesius leeanus Rathbun, Proc. U. S. Nat. Mus., vol. 21, 1898, p. 585, pi. 42, figs. 4 and 5 (type-locality, southern part of Gulf of California, 10 fathoms; type. Cat. No. 21581, ). Medaeus rugosus Boone, ^oologica, vol. 8, 1927, p. 201, text-fig. 70 (type-loca'ity, off Gardner Bay, Hood Island, Galapagos Islands; type in Mus. N. Y. Zool. Soc). Diagnosis.—Basal antennal article terminating at prolongation of front. Surface of carapace and appendages covered with pearly- granules which form a more or less reticulating pattern. Description.—Mesogastric and cardiac regions depressed; proto- gastric region forming an elevated protuberance; a sinailar but smaller protuberance at middle of branchial region, and in front of it, two tubercles. Hepatic region inclined strongly toward the ver- tical. Antero-lateral margin sub- acute, with about four distant tubercles above the edge. Sur- face covered with coarse, bead granules arranged to form a net- work or an eroded surface; gastric sutures smooth. Front strongly deflexed, thin, emarginate, a short closed median fissure; lobes oblique, sinuous, bent down at outer angles to meet basal antennal article. Upper inner angle of orbit fused with the front and without tooth. The basal antennal article is broad behind, obliquely placed, its distal surface (where the next article is commonly attached) is fixed against the downward prolongation of the front. In the type- specimen, the inner lower angle of the orbit also joins the front, closing the orbit. The antenna, however, is not without a flagellum, as at first supposed. By rotating the eyestalk a short flagellum of a few articles (tip broken off) was disclosed; its attachment is entirely concealed as it proceeds from the upper surface of the basal article, bordering the Hning of the orbit.^^ In a smaller male from the type
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