OPHIURANS OF THE PHILIPPINE AND ADJACENT WATERS. 475 



PLATE 97. 



FIG. 1. Ophiothrix aristulata: 



a, arm spines of the dorsal surface of the disk. 

 6, club spinea of different sizes. 



c, club spines with lateral and terminal spinules. 



d, hook formed by the first ventral arm spine in the terminal part 



of the arms (specimen collected by the Albatross). 



e, hook formed by the first ventral arm spine in a small sized speci- 



men collected by the Challenger. 



f, two tentacle scales on the same level with c. 



2. Ophiothrix artnata: 



a, first ventral arm spine transformed into a hook. 



0, tentacle scale. 



3. Ophiothrix aspidota: 



a, club spines on the dorsal surface of the disk. 



6, first ventral arm spine transformed into a hook at several places. 



c, second and third arm spine. 



d, fourth arm spine. 



e, tentacle scale. 



4. Ophiothrix bellax: 



a, club spines and arm spines of the dorsal surface of the disk. 

 6, first ventral arm spine transformed into a hook, 

 c, tentacle scale. 

 5. Ophiothrix capillaris: 



a, club spines of the dorsal surface of the disk. 

 &, first ventral spine transformed into a hook. 



c, second arm spine transformed into a hook. 



d, tentacle scale. 

 6. Ophiothrix deceptor: 



a, first ventral arm spine transformed into a hook. 

 6, second arm spine. 

 c, tentacle scale. 



PLATE 98. 

 PIG. 1. Ophiothrix coronata: 



a, club spines of the dorsal arm plates. 



6, club spines of the dorsal surface of the disk. 



c, first ventral arm spine transformed into a hook at several places. 



d, second and third arm spine, 

 c, tentacle scale. 



2. Ophiothrix crassispina: 



a, tentacle scale. 



6, first ventral arm spine transformed into a hook. 



c, club spines of the dorsal surface of the disk. 



d, second and third arm spine. 



3. Ophiothrix cumulata: 



a, club spines of the dorsal surface of the disk, 

 fo, first ventral arm spine transformed into a hook. 

 c, tentacle scale, 

 (f, second and third arm spine. 



4. Ophiothrix exigua: 



c, club spines of the dorsal surface of the disk. 



1, second and third arm spines. 

 r% tentacle scale. 



