202 



BULLETIN 75, UNITED STATES NATIONAL MUSEUM. 



ture 55.9, 2 specimens; station 4902, Eastern Sea, lat. 32 30' 50" 

 N.; long. 128 34' 40" E., 139 fathoms, gray sand, broken shells, 

 bottom temperature 52.9, 2 specimens; station 4903, Eastern Sea, 

 lat. 32 31 ' 10" N.; long. 128 33' 20" E., 107 to 139 fathoms, gray 

 sand, broken shells, bottom temperature 52.9, 1 specimen; station 

 4965, off eastern Japan, lat. 33 35' 20" N.; long. 135 10' 50" E., 

 191 fathoms, dark green-gray sand, shells, bottom temperature 

 49.4, 71 specimens; station 4967, off eastern Japan, lat. 33 25' 10" 

 N.; long. 135 37' 20" E., 244 to 253 fathoms, brown mud, sand, 

 foraminif era, bottom temperature 45.9, 2 specimens; station 5079, off 

 Omai Saki Light, lat. 34 15' N.; long. 138 E., 475 to 505 fathoms, 



FIG. 93. OPHIACANTHA OMOPLATA. X 8. a, FROM ABOVE; 6, FROM BELOW; c, SIDE VIEW OF TWO ARM 



JOINTS NEAR DISK. 



pebbles, bottom temperature 39.1, 4 specimens; station 5001, 

 Uraga Strait, lat. 35 4' 10" N.; long. 139 38' 12" E., 197 fathoms, 

 green mud, coarse black sand, pebbles, bottom temperature 47.6, 

 5 specimens. Bathymetrica] range, 63 to 584 fathoms. Tempera- 

 ture range, 55.9 to 37.2. One hundred and twenty-two specimens. 

 Type. Cat. No. 25630, U.S.N.M., from station 4902. 



OPHIACANTHA OMOPLATA, new species.* 



Similar to adiaphora in size and proportions and in many other 

 respects. Upper arm plates a little larger and relatively wider 



papilla. 



, signifying shoulder blade, in reference to the shape of the distal oral 



