. Bulletin - United States National Museum. Science. Fic. 377.—Mesidotp;a (After Miers). «, OPKRcrLAR VALVE (INNER SIDE). X |. h. HEAD WITH BOTH PAIRS OF AXTEN- 4:!' north, lonoitude 78" 48' west; latitude 71" 31' north, lono-itude 4!» 12'east; latitude 77" 14' north, lonoitudc 38" 2H' cast; latitude 71 57' north, lonoitiide 73" 56' west; latitude 71" 42' north, longitude 73" west; latitude 66" 33' north, long-itude 61" 50' west: Julianehaah and Greenland; Cape Smyth, Alaska; Point Barrow, f\ Alaska; Ooglaamie, Alaska; Ka
. Bulletin - United States National Museum. Science. Fic. 377.—Mesidotp;a (After Miers). «, OPKRcrLAR VALVE (INNER SIDE). X |. h. HEAD WITH BOTH PAIRS OF AXTEN- 4:!' north, lonoitude 78" 48' west; latitude 71" 31' north, lono-itude 4!» 12'east; latitude 77" 14' north, lonoitudc 38" 2H' cast; latitude 71 57' north, lonoitiide 73" 56' west; latitude 71" 42' north, longitude 73" west; latitude 66" 33' north, long-itude 61" 50' west: Julianehaah and Greenland; Cape Smyth, Alaska; Point Barrow, f\ Alaska; Ooglaamie, Alaska; Kara Sea; circumpolar. Depth. —Surface to 76 fathoms, in mud on beach. Body narrow,elon- gate, broad anteri- orly and tapering gradualh' from the middle of the body to the long, pointed terminal segment. Length of body almost four times its greatest breadth, 11 mm. : 4n mm. Length of abdomen almost half the length of entire body, 19 mm. : 40 nnn. These measurements are from a small specimen. Head with the lateral margins cleft, the posterior lobe being much the larger and produced some little distance beyond the anterior lobe. Front deeply excavate between the lateral lobes, with a small median excavation also. Eyes absent. First pair of antenna? with the l)asal article large, triangular in shape, the broad posterior extremity tapering to a narrow apex at the anterior end; the second article is short, about half as long as the basal article; the third is twice as long as the second; the fourth is a little longer than the third. The first antennae extend to the third pe- duncular article of the second pair of anteima'. The basal article of the second antenna' is short, not reach- itig beyond the antero-lateral angles; the second article has the exterior margin produced in a rounded expan- sion, and is twice as long as the basal article; the third article is onlv half as long as the second; the fourth is a little longer than the third, and has a large, round expanded process
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
