A. E. Verrill — Revision Genera and Species of Starfishes. 231 



EXPLANATION OF PLATES. 



All the figures have been drawn from nature by Mr. A. H. Verrill except 

 Plates xxivo and xxv, which are from photographs. 



Plate XXIV. 



Figure 1. — Mediaster Bairdii Ver. Type. Dorsal side of the distal part of one 



of the rays with the granules removed, x 8. 

 Figure 2. — The same specimen. Group of abactinal paxillae from the base of a 



ray with the spinules removed, showing the papular pores, x 8. 

 Figure 3. — The same. Actinal side of a ray. x 4. 



Figure 4. — The same. Abactinal side of the middle portion of a ray. x 3. 

 Figure 5. — The same. Group of adambulacral and adjacent actinal plates. x5. 

 Figure 6. — The same. Groxip of paxillte and papular pores from the abactinal 



side of the disk. Some of the paxillae have pedicellariae. x 12. 

 Figure 7. — The same from the ray, without pedicellarise. x 8. 

 Figtires 8, 9. — The same. Smaller abactinal paxillte. 

 Figure 10. — Mediaster cequalis Stim^j. Actinal side of the basal part of a ray. 



x6. 

 Figure 11. — The same specimen. Abactinal side of the basal part of a ray. x 6. 

 Figure 12. — The same specimen. Group of abactinal paxillae and papular pores 



from the base of a ray, with granules partly removed, x 8. 



Plate XXI Va. 



Figure 1. — Gmiiaster Americanus Ver. Original type, dorsal side. From a 



photograph. Somewhat reduced. 

 Figure 2. — The same specimen. Ventral side. Somewhat reduced. 



Plate XXV. 



Figure 1. — Goniaster Africanus Ver. Original type. From a photograph. 



About natural size. 

 Figure 2. — The same specimen. Ventral side. Aboiit natural size. 



Plate XXVI. 



Figure 1. — Goniaster Americanus Ver. Original type. Group of plates of the 

 abactinal radial areas at the base of a ray, showing the two kinds of 

 plates, covered with granules, and the papular pores. The central plate has 

 three spatulate pedicellariae. Much enlarged. 



Figure 2. — The same specimen. A single actinal plate having a pedicellaria 

 (p) with curved blades. The blades have been removed to show the pits into 

 which they fold when fully opened. Much enlarged. 



