PLATE XVI. 



Page 

 FigS. 1-5. LONCHOTASTER TARTAREUS, 11. sp. . . . 104 



Fig. 1. Abactinal aspect ; magnified 1^ diameters. 



Fig. 2. Actinal aspect ; magnified li diameters. 



Fig. 3. Profile view ; magnified 2 diameters. 



Fig. 4. A portion of the abactinal surface ; magnified 20 diameters. 



Fig. 5. Adambulacral and infero-marginal plates ; magnified 10 diameters. 



