Among the administrators of these penalties are Aiakos, Minos, and Rhadamanthos, the judges of the souls[837]; the Erinnyes or Furies[838]; and allegorical personages, such as Dike (Justice),[839] Ananke (Necessity),[840] or Poinae (Punishments).[841] Of the Chthonian deities, Hermes,[842] Hekate,[843] Triptolemos,[844] and Iacchos[845] are present. Olympian deities are also sometimes introduced as spectators.[846] Other figures introduced are Megara with the two children of Herakles[847]; Pelops with Myrtilos and Hippodameia[848]; a group of the Blessed Shades[849]; and (but not on this class of vase) Oknos with his ass, a subject depicted by Polygnotos in his great fresco at Delphi.[850] The subject of Ixion on the wheel is usually found by itself, but occurs on the neck of one of the Apulian vases.[851] Another subject which may be associated with the above scenes is that of _Charon_ and his bark; on the vases, however, its significance is purely sepulchral, as it is confined to the Attic white lekythi (Vol. I. p. 459), on some of which the dead man is represented entering the ferry-boat.[852] Some vases of Etruscan fabric also represent groups of Chthonian deities, especially Charon, who in the mythology of that people is no longer “the grim ferryman that poets write of,” but _Charun_, a hideous demon wielding a huge hammer.[853] In one instance he separates Alkestis from Admetos[854]; in another he watches Ajax stabbing a captive Trojan.[855] [Illustration: From _Baumeister_. FIG. 122. CHARON’S BARK (LEKYTHOS AT MUNICH). ] The _Erinnyes_ or Furies play an important part in the nether-world scenes,[856] and one is also represented at the punishment of Ixion.[857] They pursue Orestes after the slaughter of his mother and Aigisthos to Delphi and Tauris,[858] and even when with Pylades he comes to make himself known to Electra.[859] Among other mythological scenes they are found at the combat of Herakles and Kyknos[860]; with Pelops,[861] and with Medeia and Jason[862]; and threatening with punishment the hero Agrios, who is seized and bound upon an altar by Oineus and Diomedes.[863] _Kerberos_ is once seen without Herakles in the under-world vases[864]; and there is a very curious representation of his being chained up by Hermes.[865] _Hekate_ as a Chthonian deity frequently appears on the under-world vases[866]; she is also connected with Eleusinian scenes and legends,[867] such as the sending of Triptolemos,[868] the birth of Dionysos or Iacchos,[869] or with the rape and return of Persephone.[870] She appears also as a single figure.[871] Allusion has already been made to the Chthonian associations of Hermes, Triptolemos, and Iacchos (pp. 27, 52). [Illustration: FIG. 123. THANATOS AND HYPNOS WITH BODY OF WARRIOR (FROM BRIT. MUS. D 58).]