Plate 156. 



These fi.^urcs are intended to sli(»\v some of the ehanicters npon winch several 

 new genera of lirisingidae have l)een based. See the synopsis, p. .")(ll. 



Fig. 1. BrisiiKju traclu/disca : actinal view of adanil)idacral (a), niarjiinal (/»), 

 and mouth (o) plates, X 8. 1«. Same; lateral view of phites of inter- 

 brachial angle after removal of rays; /, interradial plate: <nii, amhu- 

 lacral plate; otliers as in Fig. 1. P. 510. 



2. AstrostcpJiaiif iiiolKccdini : actinal view of adamhulacral ( (/ ) and mouth 

 (o) plates, X S. "_'(/. Same; lateral view of plates of interbraehial 

 angle after removal (if rays; /, interradial iilaic: iii. marginal plates; 

 am. ambulacral ])lates: (/, adambulacral plates. V. ."il'O. 



o. Brisiinjillii fninilis: actinal view of marginal, adambulacral, and mouth 

 plates, X 8; lettering as in fig. 1. 3a. Same; lateral view of plates 

 of interbrachial angle, X8; only tiie artieulai- surface of the mar- 

 ginal and adambulacral plates is stippled; side of interradial plate is 

 stippled to show prominence ; lettering as in 2a. P. .524. 



4. Freyella microplax; lateral view of plates of interbrachial angle, 

 X 8; lettering as in 2fi. Only the surface of the interradial and oral 

 plates is stippled: note absence of marginal plates. For description 

 of this species see l^'isber. 1!»1T/'. p. 430. 



703 



