MONOGRAPH OF THE EXISTING CRINOIDS. 769 



Plate 6. 



Arm Ktruetnrc of comatulids. 



Fio. 1015. — Dorsal view of proximal portion of specimen of Comanthus parvicirra, with homolo- 

 gies of ossicles indicaterl. (Adapted from P. H. Carpenter.) 

 1016. — Lateral view of proximal portion of sjiecimen of I'entametrucrinuis semperi, with 

 homologies of cssieles indicated. (Adapted from P. H. Carpenter.) 



Plate 7. 



Arm structvre of comatvlids. 



Pio. 1017. — Central portion of specimen of Comanthus parviciira in dorsal view, with atroi)liled 

 left posterior arm. (After P. H. Carpenter.) 

 1018. — Central portion and part of an arm of t.vpe specimen of Antedon diibenii in dorsjil 

 view, with homologies of ossicles iiidicited. (Adapted from P. H. Carjtenter. ) 



Platk 8. 



Arm structure of comatulids. 



Fio. 1019.— Central portion and part of arm of Comactinia meridionalis in dorsal view, with 

 homologies of ossicles indicated. (Adapted from P. H. Carpenter.) 

 1020. — Centra! portion and part of two arms of specimen of Comatula rotalaria, with 

 homologies of ossicles indicated. (Adapted from P. H. Carpenter.) 



I'LATE 9. 



Arm structure of comatulids. 



Fig. 1021. — Dorsal view of proximal portion of specimen of Comantheria briareus, with homolo- 

 gies of ossicles Indicated. (Adapted from P. H. Cariienter. ) 



1022. — Dorsal view of proximal portion of specimen of Capillaster multiradiata, with 

 homologies of ossicles indicated. (Adapted from P. H. Carpenter.) 



1023. — Dorsal view of proximal portion of two post-radial series of Comaster novwguinea, 

 with homologies of ossicles indicated. (Adapted from P. H. Carpenter.) 



Plate 10. 



Arm structure of comatulids. 



Fio. 1024. — Dorsal view of proximal portion of specimen of C'/nnanthus trichoptera, with homolo- 

 gies of ossicles indicated. (Adapted from P. H. Carpenter.) 



1025. — Dorsal view of proximal portion of specimen of Comanthus parvicirra, with homolo- 

 gies of ossicles indicated. (Adapted from P. H. Carpenter.) 



1026. — Dorsal view of proximal portion of specimen of Capillaster sentosa, with homologies 

 of ossicles indicated. (Adapted from P. H. Carpenter.) 



Plate 11. 

 Arm structure of comatulids. 



Fig. 1027. — Distal arm division in specimen of Dichrometra dodcrleini. 



1028. — Centrodorsal and arms bases of specimen of Psathyrometra higradata, showing (to 



the left) a regenerating arm. (After Hartlani). ) 

 1029. — Dorsal view of proximal ixirtion of two post-radial series of specimen of Comaster 

 multibrachiata, with homolo.gies of ossicles indicated. (Adapted from P. H. Car- 

 penter.) 

 142140— 21— Bull. 8'J 50 



