. Bulletin - United States National Museum. Science. 58 BULLETIN 189, UNITED STATES NATIONAL MUSEUM extremity of ventral, increasing in width posteriorly; snout moderately long, in length anterior to axil of pectoral, and in width of disk; its preoral length only a little less than its length to eye, in length anterior to axil of pectoral, and in width of disk; eye moderately large, its longitudinal diameter scarcely equal to width of spiracle, in snout; interorbital moderately broad, concave, about times diameter of eye, in snout, and in length anterior to ve
. Bulletin - United States National Museum. Science. 58 BULLETIN 189, UNITED STATES NATIONAL MUSEUM extremity of ventral, increasing in width posteriorly; snout moderately long, in length anterior to axil of pectoral, and in width of disk; its preoral length only a little less than its length to eye, in length anterior to axil of pectoral, and in width of disk; eye moderately large, its longitudinal diameter scarcely equal to width of spiracle, in snout; interorbital moderately broad, concave, about times diameter of eye, in snout, and in length anterior to vent; internarial space and width of mouth equal, in preoral length; mouth bent forward very slightly, in width of disk; teeth in 32 transverse rows, with a round crown, slightly raised margin, and posteriorly with a low pointed cusp; prickles in a moder-. FiGURE 10.—Psammohatis asper, new species. From the type, 480 mm. long, Pachacamac Island, Peru ( No. 127786). Insert, ventral view of head. ately narrow band on lower surface along anterolateral margins of disk, extending back a little beyond posterior rim of spiracles; no prickles on snout or interorbital; a few along inner margin of spiracles; a small patch near margin opposite spiracles; present on back behind nuchal region and continued on dorsal surface of tail; a low star- shaped buckler on orbital ridge in front of eye, and indications of two posterior to eye; a row of 5 median ones in nuchal region; and a row of low, strong sharp spines on tail, the last spine being situated be- tween the dorsal fins; a patch of small spines on pectorals near inner. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press
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