. Bulletin - United States National Museum. Science. 270 BULLETIN 15, UNITED STATES NATIONAL MUSEUM. bottom temperature °, 2 specimens; station 4895, Eastern Sea, lat. 32° 33' 10" N.; long. 128° 32' 10" E., 95 fathoms, green sand, broken shells, pebbles, bottom temperature °, 2 specimens; sta- tion 5070, Suruga Gulf, lat. 35° 3' 25" N.; long. 138° 47' 40" E., 108 fathoms, mud, sand, broken shells, bottom temperature °, 2 specimens. Type.—Cat. No. 25585, , from station 4895. The transverse spiny bands on the upper side of the arms will readily distinguish
. Bulletin - United States National Museum. Science. 270 BULLETIN 15, UNITED STATES NATIONAL MUSEUM. bottom temperature °, 2 specimens; station 4895, Eastern Sea, lat. 32° 33' 10" N.; long. 128° 32' 10" E., 95 fathoms, green sand, broken shells, pebbles, bottom temperature °, 2 specimens; sta- tion 5070, Suruga Gulf, lat. 35° 3' 25" N.; long. 138° 47' 40" E., 108 fathoms, mud, sand, broken shells, bottom temperature °, 2 specimens. Type.—Cat. No. 25585, , from station 4895. The transverse spiny bands on the upper side of the arms will readily distinguish this species from all of its allies. The specimens before me have a disk diameter ranging from 5 to 20 mm. OPHIOBYRSA SYNAPTACANTHA, new species, a Disk 12 mm. in diameter; arms about 220 mm. long. Disk covered by skin containing numerous rounded scales, only a few of which carry minute sharp spinelets. Radial shields small, well separated, plainly indicated and made conspicuous by the linear group of spine- lets which they carry, at least on the proximal end. Upper arm. Fig. 135.—OpmoBYRSA syn.^ptacantha. X 4. o, from above; b, from below; c, side view of THREE ARM JOINTS NEAR PISK. plates separated by naked skin, broken into several pieces, of which two median are largest; none of them carry spines or spinelets. Interbrachial spaces below like disk. Genital slits large. Plates of whole oral surface more or less obscured by skin. Oral shields small, apparently squarish-oval, longer than wide. Adoral plates at sides of shield very small, much longer than wide. Oral papillas and teeth (tooth papillae ?) as in acanthinohrachia. Under arm plates indistinct, apparently longer than wide, with a deep median notch in distal margin. Side arm plates small, each with four cylindrical, blunt, spines, about as long as joint, more or less united to each other by a fold of skin, which includes two-thirds or more of each spine. No tentacle scales. Color (dried from alcohol), dark
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