Bull. U. S. F. C. 1902. 
Plate 7. 
Figs. 37, 38. Opliiura brevispina.—S7. Oral view of base of arm, with adjacent parts (x 5). 38. Side view of three arm 
joints, to show arm spine (x 5). 
Figs. 39, 40. Ophioglypha robusta.—SQ. Oral view of base of arm, with adjacent parts (x 10). 40. Side view of three arm 
joints, to show arm spines ( x 10). 
Figs. 41, 42. Ophiopholis aculeata. — 11. Oral view of base of arm, with adjacent parts (x 5). 42. Side view of three arm 
joints, to show arm spines ( x 5). 
Figs. 43, 44. AviphipholU aquamata.—H. Oral view of base of arm, with adjacent parts (x 10). 44. Side view of three 
arm joints, to show arm spines ( x 10). 
Figs. 45-47. Gorqonncepltalus agassizii. — 15. Oral view of base of arm, with adjacent parts (x 2). 46. Side view of arm 
joints near middle of arm ( x 2). 47. Side view of arm joints near tip of arm ( x 10). 
