. Fig. 22. Amphiura princeps, Koehler. Part of oral side (a). Mouthparts of another specimen (b). Part of arm, dorsal side, joints ca. 20-23 ('")• -12. of the small outer mouth papilla, the very small inner ventral plate, and the generally larger number of arm spines in A. princeps, distinguish the two species very clearly, besides the fact that A. Eiigeniae is viviparous and apparently parthenogenetic, whereas A. princeps is evidently not viviparous and has separate sexes, the males being of common occurrence. Amphiura incana, Lyman Amphiura incana, Lyman, 1882. Sci. Results 'Chal
. Fig. 22. Amphiura princeps, Koehler. Part of oral side (a). Mouthparts of another specimen (b). Part of arm, dorsal side, joints ca. 20-23 ('")• -12. of the small outer mouth papilla, the very small inner ventral plate, and the generally larger number of arm spines in A. princeps, distinguish the two species very clearly, besides the fact that A. Eiigeniae is viviparous and apparently parthenogenetic, whereas A. princeps is evidently not viviparous and has separate sexes, the males being of common occurrence. Amphiura incana, Lyman Amphiura incana, Lyman, 1882. Sci. Results 'Challenger'. Ophiuroidea, p. 128, pi. xxxiii, figs. 5-7. A. incana, H. L. Clark, 1923. Echinoderm Fauna of South Africa. Ann. S. African Mus., xni, p. 328. A. incana. Hertz, 1926. Deutsche Siidpolar-Exped. Ophiuroiden, p. 34, Taf. vii, fig. i. A. incana, Mortensen, 1933. Echinoderms of South Africa. Papers from Dr Th. Mortensen's Pacific Exped., lxv (Vid. Medd. Dansk Naturh. Foren., 93), p. 351. St. 91. 23. ix. 26. False Bay, South Africa, 35 m. 6 specimens. St. 283. 14. viii. 27. Annobon, Gulf of Guinea, 18-30 m. 12 specimens.
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