Fig. 11. Jaws of Proctonofus mucroniferus: a and b, the two parallel plates; c, anterior cap or
plate; d, homy arch uniting the jaws.
12. Two of the spines from the tongue of Proctonotus.
13. Hepatic gland from a papilla of Proctonotus : a, glandular portion; b, duct.
14. Buccal organ of Hemuea dendritica, as seen in the compressor: a, oesophagus; b, buccal
organ; c, oral opening; d, tongue; e, anterior attenuated termination of the same.
15. Three spines from the tongue of Hemuea dendritica.
16. Hepatic gland from a papilla of Hemuea bifida: a, central stem or duct; b} transparent
belt on the same, marking the place of sphincter; c, a portion of the central duct,
exhibiting the sphincter in a state of contraction.
17. Buccal organ of Alderia modesta: a, oesophagus; b, buccal organ; c, tongue.
18. Three spines from the tongue of the same.
19. Penis of the same: a, crystalline spur at the apex of the intromittent organ.
