PLATE VI. 



Fig. 1. Ophiurodon grandisqunmn . Dorsal view of the skeleton of two 



oral angles and the first three vertebrae, x 12. 

 Fig. 2. OpJdurochœta mixta. Dorsal view of the skeleton of two oral 



angles, x 10. 

 Fig. 3. Ophiuroconis miliaria. Dorsal view of the skeleton of two oral 



angles, x 10. 

 Fig. 4. Ophiaraclina incrassata. Dorsal view of the skeleton of two oral 



angles and the first two vertebrae, x 2. 

 Fig. 5. BatJiypectinura gotoi. Dorsal view of the skeleton of two oral 



angles and the first two vertebrae, x 2|-. 

 Fig. 6. Pectinura anchista. Dorsal view of the skeleton of two oral angles 



and the first two vertebrae, x 10. 

 Fig. 7. Ophiaraclmella gorgonia. Dorsal view of the skeleton of two oral 



angles and one arm base, with the radial shields turned up, i.e. in 



ventral view, x 7. 

 Fig. 8. Ophiochiton fastigatus. Dorsal view of the skeleton of two oral 



angles and one arm base. x4. 

 Fig. 9. OpMoplax lamellosa. Dorsal view of the [skeleton of two oral 



angles and one arm base, x 20. 

 Fig. 10. Ophiodoris pericalles. Dorsal view of the skeleton of two oral 



angles and one arm base. X 10. 

 Fig. 11. Ditto. Dorsal view of two vertebrae near disk, x 10. 



