PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. [188* 



EXPLANATION OF PLATE X. 



Chondracanthus galeritus, sp. n. 9 (page 317). 



Fig, 1. Posterior anrenua3, and anterior antenna of one side, enlarged 35 diam- 

 eters. The shaded portions represent the horny frame- work at the bases 

 of the posterior antennae. 



Figs. 2, 3. Tips of the anterior antennte of two specimens, showing the slightly 

 lobed termination ; enlarged considerably more than fig. 1. 



Fig. 4. Posterior antennje of a second specimen, enlarged 35 diameters. The 

 shaded portions represent the walls of the antennis and horny basal frame- 

 work, the latter varying greatly in appearance, according to the treat- 

 ment of the preparation. 



Fig. 5. First pair of mouth organs, enlarged 250 diameters. 



Fig. 6. Second pair of mouth organs, enlarged 12."> diameters. 



Fig. 7. Third pair of mouth organs, enlarged 12.") diameters. 



Chondraeanthits phycidis, sp. n. $ (page 320). 



Fig. 8. Anterior antenna of one side, enlarged 112 diameters. 



Fig. 9. Po.sterior antenna of one side, enlarged 120 diameters. 



Fig. 10. First pair of mouth organs, enlarged 165 diameters. 



Fig. 11. Second pair of mouth organs, enlarged 165 diameters. 



Fig. 12. Third pair of mouth organs, enlarged 165 diameters. 



Fig. 13. Palpus from side of mouth opening, enlarged 165 diameters. 



