NORTH PACIFIC OPHIURANS IN NATIONAL MUSEUM CLARK. 203 



than in that species. Disk spines with shorter and more numerous 

 thorns, so that they are really rough spines. Outermost oral papilla 

 wide ajid rounded, shaped like the shoulder blade of many Carnivora. 

 Oral shield very wide and short. Tentacle scale conspicuous, long, 

 rounded at tip, often distinctly furrowed. Under arm plates more 

 nearly square than in adiapTiora. 



Locality. Albatross station 4861, off Korea, lat. 36 19' N.; long. 

 129 47' E., 163 fathoms, green mud, bottom temperature 33.4, 2 

 specimens. 



Type. Cat. No. 25740, U.S.N-M., from station 4861. 



Although this species is very near to the three preceding I do 



FIG. 94. OPHIACANTHA. ACANTHINOTATA. x 6. a, FROM ABOVE; b, FROM BELOW; c, SIDE VIEW OF TWO 



ARM JOINTS NEAR DISK. 



not think there can be much question of its validity. The distal 

 mouth papilla and the disk spinules are very characteristic features, 

 and the peculiar tentacle scales are quite noticeable. 



OPHIACANTHA ACANTHINOTATA, new species.& 



Disk 9 mm. in diameter; arms about 45 mm. long. Disk covered 

 with numerous rough blunt spines, about half a millimeter long. 



& ' 'AKavOworaroe, signifying most spiny, in reference to the large number and 

 length of both disk and arm spines. 



