NORTH PACIFIC OPHIURANS IN NATIONAL MUSEUM CLARK. 183 



other. Side arm plates very large, meeting broadly both above and 

 below; each plate carries five straight, slender, sharp, smooth spines, 

 the uppermost longest and considerably exceeding the joint; on the 

 first two joints outside the disk there are eight or nine spines, which 

 meet the corresponding series of the same joint on the upper side of 

 the arm, and thus the arm is encircled at its base (as in discyda) by 

 two nearly complete rings of eighteen and sixteen spines. Tentacle 

 scale single, oval but acute. Color (dried from alcohol), disk very 

 pale gray, arms very light yellowish. 



FIG. 83. OPHIOMITRA HABROTATA. < 15. n, FROM ABOVE; 6, FROM BELOW; c, SIDE VIEW OF TWO ARM 



JOINTS NEAR DISK. 



Localities. Albatross station 4S93, Eastern Sea, lat. 32 32' N. ; 

 long. 128 32' 50" E., 95 to 106 fathoms, gray sand, broken shells, 

 pebbles, bottom temperature 55.9, 1 specimen; station 4900, Eastern 

 Sea, lat. 32 28' 50" N. ; long. 128 34' 40" E., 139 fathoms, gray sand, 

 broken shells, bottom temperature 52.9, 4 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. 



Type.C&t. No. 25609, U.S.N.M., from station 4900. 



