PLATE V. 



Fig. 1. AstropJiiura kaioamurai. Dorsal view of the skeleton of two oral 



angles and one arm base, x 10. 

 Fig. 2. Ditto. Ventral view of the skeleton of three arm joints within 



the pentagonal body, the ventral arm plates removed to expose 



the vertebrae, x 10. 

 Fig. 3. Ditto. Dorsal view of a distal vertebra, x 125. 

 Fig. 4. Ditto. Inner articular surface of the same, x 125. 

 Fig. 5. Ditto. Outer articular surface of the same, x 125. 

 Fig. 6. StegopMura sladeni. Dorsal view of the skeleton of two oral angles 



and the first two veitebrae. x 18. 

 Fig. 7. OpMommium trydmum. Dorsal view of the skeleton of two oral 



angles and the first two vertebrae, x 10. 

 Fig. 8. Ophiomnsium cancellatum. Dorsal view of the skeleton of two oral 



angles and the first two vertebrae, x 12. 



Ophiozonella longispina. Dorsal view of the skeleton of two oral 



angles and the first two vertebrae. > 6. 



Ophiozona impressa. Dorsal view of the skeleton of t^o oral 



angles and the first three vertebae. x 8. 



Ophioplocus joponicus. Dorsal view of the skeleton of two oral 



angles and one arm base, x 8. 



Ophioceramis januarii. Dorsal view of the skeleton of two oral 



angles and the first vertebra, x 10. 

 Fig. 13. Opldoleuce diariscliema. Dorsal view of the skeleton of two oral 



angles and one arm base. X 8. 



