Phormosoma rigidum Agassiz

• Agassiz, A., 1881. Challenger Echinoidea, p. 104, Pl. 12.

Material Examined: None.

The holotype was taken at Challenger Station 169, in 700 fathoms, off East Cape.

Phormosoma bursarium Agassiz

• Agassiz, A., 1881. Challenger Echinoidea, p. 99, Pl. 10.

Material Examined: Two specimens from the Chatham Islands Expedition 1954, one from Station 41, 330 fathoms ("rich, saturated red-purple", G. A. Knox), the other from Station 6, in 220 fathoms, on the Chatham Rise.

The species has not been recorded from New Zealand before, but as it is known to be wide-ranging in the Pacific, its occurrence was to be expected.