PLATE CX. 



Page 



Figs. 1-3. Brtsinga armillata, n. sp 608 



Fig. 1. Abactiual aspect of a ray and the disk ; magnified 1^ diameters. 

 Fig. 2. Actinal aspect ; magnified 1^ diameters. 

 Fig. 3. Adambulacral plates ; magnified 5 diameters. 



Figs. 4-7. Beisinga discincta, n. sp 613 



Fig. 4. Abactiual aspect of a ray ; magnified 1^ diameters. 



Fig. 5. Actinal aspect of a portion of a ray ; magnified 1^ diameters. 



Fig. 6. Abactinal aspect of a portion of a ray ; magnified 8 diameters. 



Fig. 7. Adambulacral plates ; magnified 8 diameters. 



Figs. 8, 9. Brisinga membranacea, n. sp. . . .611 



Fig. 8. Abactinal aspect of a portion of a ray ; magnified 1^ diameters. 

 Fig. 9. Abactinal aspect of a portion of a ray ; magnified 8 diameters. 



