REFERENCES
- Clark , A. L. 1966 . Echinoderms from the Red Sea, Part 2 (Crinoids, Ophiuroids, Echinoids and more Asteroids) . Bull. Sea Fish. Res. Sta. Haifa , 41 : 26 – 58 .
- Mortensen , TH. 1943 . A monograph of the Echinoidea. III. 3. Camarodonta, II, C.A. Reitzel, Copenhagen. 446 pp., 215 figs., 66 pls