Plate 77. 



Fig. 1. LitliosoiiKi ixiiiclim: abactiiial siii'l'ace of type, p. 301. 



2. Iconastcr lovt/inunnis; actinal surface, p. 303. 



3. Pontioccromus (jiaiulifi; abactiiial surface of type, p. 294. 

 624 



