472 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



FIG. 8. A specimen from station 5624 ; lateral view of an arm. 

 9. The same; ventral surface. 



10. Opfiiomusium simplex from station 5357; dorsal surface. 



11. The same ; ventral surface. 



PLATE 89. 



FIG. 1. Ophiomusium facundum from station 5378; ventral surface. 



2. The same ; dorsal surface. 



3. Ophiomusium morio from station 5392; ventral surface. 



4. The same ; dorsal surface. 



5. Ophiomusium facundum from station 5378 ; oblique view of the ventral 



surface of the disk. 



6. The same ; lateral view of an arm. 



7. Ophiomusium scalare from station 5135; ventral surface. 



8. Ophiomusium armatum from station 5428; ventral surface. 



9. The same ; lateral view of an arm. 

 10. The same; dorsal surface. 



PLATE 90. 



FIG. 1. Ophiomusium scalare from station 5135; dorsal surface. 



2. The same ; lateral view of an arm. 



3. Ophiomusium ligatum from station 5445; ventral surface. 



4. The same ; dorsal surface. 



5. The same; lateral view of an arm. 



6. Ophiomusium fimbriatum from station 5614; dorsal surface. 



7. The same; ventral surface. 



8. The same ; lateral view of an arm. 



9. Ophiomusium impotens from station 5605 ; dorsal surface. 



10. The same ; ventral surface. 



11. The same ; lateral view of an arm. 



PLATE 91. 



FIG. 1. Ophiomusium facetum from station 5263; dorsal surface. 



2. A specimen from station 5127 ; ventral surface. 



3. A specimen from station 5423 ; dorsal surface. 



4. A specimen from station 5114 ; dorsal surface. 



5. A specimen from station 5127 ; lateral view of an arm. 



6. Ophiomusium relictum from station 5641 ; ventral surface. 



7. The same; dorsal surface. 



8. The same ; lateral view of an arm. 



PLATE 92. 



In the figures on this plate, as well as on those following, the arm spines and 

 tentacle scales, unless otherwise indicated, are from the proximal third of the 

 arms. 

 FIG. 1. Ophiomyxa oengalensis; arm spines from different heights on the 



arms. 



2. Ophiomyxa irregularis; arm spines: 



a, from the base of the arms. 



b, from the terminal third. 



c, in the immediate vicinity of the extremity where the arm spines 



are transformed into hooks at several points. 



