* Stereocidaris alcocki (Anderson, 1894)

Fig. 10. A–C.

Stereocidaris tricarinata: Döderlein, 1906: 112 –114. Pl. X, Fig. 7. Pl. XXXVI, Fig. 3. Stereocidaris alcocki: Mortensen, 1928a: 266 . Pl. LXXI, Fig. 8. Pl. LXXXII, Fig. 18; Schultz, 2011: 1037; Filander & Griffiths, 2014: 51. Pl. I, Fig. D.

Material examined. A28229

Identification. Globular, solid test. Apical disc with oculars insert, genital plates raised. Primary spines with three keels basally, two arranged laterally and one on underside; scrobicular spines having longitudinal furrows.

Global maximum size. Maximum test diameter 32 mm.

Global distribution. Restricted to Indian Ocean (Schultz 2011) including East coast of South Africa, depth 371 – 850 m.