DESCIilPTION OF inE PLATES. 



These are all alcoholic specimens; hut, in drawlnj; them, the spirit was allowed to evaporate, so 

 that the details coidd be properly seen. 



PLATE I. 



Fig. 1. Ophioglyplia sinensis. 

 " 2. " " under side of sixth arm-joint, to show the position of the tentacle- 



scales. 

 Figs. 3,4. Ophioglypha falcifera ; arm-spines of the basal joints. 



Fig. 5. " " bas(^ of the arm in profile, with edge of disk and comb of papilla;. 



" C. Ophyoglypha acervata ; under side of an arm-joint. (The lobe on the outer side is not 



made distinct enough.) 

 " 7. Ophiocnida olivacea. 



" 8. " " under siile of an arm-joint showing the spinclikc tentado-scale. 



" 9. Ophiocnida Putnami. The little or;;ans at the outer corners of the mouth-slits are the 



month-tentacles. 

 " 10. Ophiothela tigris. 

 " 11. " " enlargeil view of the parts near the mouth, and of the first and second 



under arm-plates, and the first set of arm-spines. 

 " 12. Ophiothela tigris. One of the pad-like side arm-plates bearing its arm-spines. 

 " 13. Ophiomastix janualis. 

 " II. " " under side of an arm-joint, showing the small and great tentaele- 



scales. 

 " 15. Ophiomaza cacaotica. 

 " 16. Astrogoniphus vallatus. 



" 17. " " first sets of arm-spines magnified; o, head of the genital-slit. 



" 18. " " a piece near the tip of the arm, highly magnifieil, showing the 



granulations on the arm-joints, and the ridges of larger granules, between the joints, 



on which stand the hooks. 

 " 10. Ophiocreas lumbricus. 

 " 20. " " an angle of the mouth seen from within, showing the column of 



teeth, and on each side a bunch of granules or small pai)ilhe, beyond which appear the 



two pairs of mouth-tentacles. 

 " 21. Ophiocreas lumbricus; an arm-joint showing the thorny arm-spines. 



PLATE II. 



Figs. 1, 2. Ophiomusium eburneum, from above and below. 

 Fig. 3. " " arm tronj the side. 



" 4. Ophiomitra valid.i. 



" 5. " " an arm-spine. 



" G. " " thorny slumps from the disk. 



" 7. Ophiochondriis convolnlus. 



" 8. ()j)liiothamnus vicarius. 



" y. " " an .inn joint from below. 



" 10. Ophiocten deprefsuni. 

 Figs. 11, 12. Ophiomyces frutectosus, from above and below. 



^>S- 13. " " arm-joint in section showing the retracted tentacles and the 



arrangement of ilic arms|iines. 



