DESCRIPTION OF TEE PLATES. 



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

 that the details could be properly seen. 



PLATE I. 

 Fig. 1. Ophioglypha 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. " " base of the arm in profile, with edge of disk and comb of papillae. 



" G. Opbyoglypha aeervata ; under side of an arm-joint. (The lobe on the outer side is not 

 made distinct enough.) 



" 7. Ophiocnida olivacea. 



" 8. " " under side of an arm-joint showing the spine like tentacle-scale. 



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

 mouth-tentacles. 



" 10. Ophiothela tigris. 



" 11. " " enlarged 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. 



" 14. " " under side of an arm-joint, showing the small and great tentacle- 



scales. 



" 15. Ophiomaza cacaotica. 



" 1C. Astrogomphus vallatus. 



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



;i IS. " " a piece near the tip of the arm, highly magnified, showing the 



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

 on which stand the hooks. 



" 19. 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 papilla?, 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 eburneuin, from above and below. 

 Fig. 3. " " arm from the side. 



" 4. Ophiomitra valida. 

 " 5. " " an arm-spine. 



" 6- " thorny slumps from the disk. 



" 7. Ophiochondrus convolutus. 

 8. Ophiothamnus vicarius. 



'■'■ " " an arm joint from below. 



" 10. Ophioctcn depretsum. 

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



*"S' 13 - '" arm-joint in section showing the retracted tentacles and the 



arrangement of the arm spines. 



