Plate 3G. 



Fig. 1. rcrscpJionastcr cvr)jac1is; spiiiclcl fnim iic;ir inner cduc of infero- 

 nuiriiiiiiil plate, X 52. 1«. Sanio ; spinrk't t'roni (iiUlt imii of iiifero- 

 iiuirsiiial plate, X 52. P. 112. 



2. I'crscplioudsfcr ciiriiartis hrcrisiiinus : tw(Mfrh siiperomarginal plate, and 



upper v\u\ of adjacciii inreioiiiaraiiial plate, showing the small siipero- 

 marginal sitines ; second row of lateral sjiines marked 2: X 0.5. 2*/. 

 Same; eighth adanibnlacral ])late, X ().5. 1'. Il5. 



3. Pcfsci)lio)i(istcr liizaniciix, type; sixth iuferomarginal and adjacent ac- 



tinal intermediate and adanibnlacral itlates. X G.5. 8(/. Same; pax- 

 illne fi-oni base of I'ay : a iiediccllai-ia is shown on the left: X 10. oh. 

 Same; si)iiu'lets from inieromarginal plates, X 52. P. 118. 



4. Pcrsephonastcr anchistiis, type; fifth inferomarginal and adjacent ac- 



tinal intermediate and adanibnlacral plates. X 4. The inferomarginal 

 appears to be narrower iliau it really is on account of foreshortening. 

 The series form a beveled border to ray. 4«. Same; outline of an 

 inferomarginal plate, viewed without foreshortening, X 4. 4/;. Same: 

 2 paxillae from radial line, base of ray, showing a pedicellaria (pod.) 

 and 2 papulae, X It!. 4c. A si)inelet from near middle of infero- 

 marginal jilate. X about 2S ; note that the inaguitical ion is aboul half 

 that of /'. riiriiiictis and /'. I iii'iiiiciis. id. Same: spinelcl from near 

 iiuier edge ol ill lei'dniargina I pl:ile. X 2S. l\ t17. 



5S3 



