Plate 15. 



Fig. 1. Astroiicctoi hiiclliis: liftli inferomarL^inal i»late and adjncoiit adaiii- 

 bulacrals of type, XU.G. Iff. Same; paxilla from interradial region of 

 disk. XO.n. Ih. Same; a pedieellaria and 2 adjacent paxillae from 

 radial area at lyase of ray, X9.G. P. 84. 



2. Axtrojicctcn pcdiccUaris; sixtli inferoniarginal plate and 4 adaml)nlaeral 



plates of type, X9.6; note the adambulacral and inferomarginal pedi- 

 eellariae. 2a. Same; ninth and tenth snperomarginal plates, and upper 

 end of corresponding inferomarginals, and also adjacent abactinal 

 paxillae and pedieellaria, X9.6; note superomarginal and inferomar- 

 ginal pedicellariae ; the inferomarginal spines have been removed from 

 proximal plate ; the superomarginal spines are longer at base of ray. 

 2b. Same; 2 paxillae from base of ray, side view, X9.6. 2c. Same; 

 a radial paxilla, expanded, X9.G. P. 87. 



3. Astropcctcn cremicus : ninth inferomarginal plate and 2 adjacent adam- 



bulacral plates of type, X9.6. 3(i. Same; third adambulacral plate of 

 type, showing one of the large subaml)ulacral pedicellariae, X9.6. 

 3?>. Same; side view of a paxilla from interradial line midway be- 

 tween center and margin, X32 3c. Same; a i)edicellaria and 2 ad- 

 jacent paxillae from proximal third of ray. near radial line, X12 

 3(/. Same; paxilla from iiroxinial third of niy near margin, X12. 

 3r. Same; dorsal view ol' an abactinal pedieellaria, X 12. P. 79. 



5G2 



