145 
resulting in the transformation of the dentate into an edentate animal, 
a transformation which is performed in a very short time, must 
claim considerable attention. 
1. Goniocidavis umbraculum Hutton. 
(PI. VI. Figs. 1—2). 
Cidaris tabaria. Hutton. 1872. Catalogue of the Echinodermata of New 
Zealand, p. 10. 
Gonioridaris iimbracalum. Hutton. 1878. Notes on some New Zealand 
. Echinoderms, with descriptions of new species. 
Trans. N. Z. Inst. XI. p. 306 
Farquhar. 1898. On the Echinoderm Fauna of 
New Zealand. Proc Linn. Soc. N. S. Wales. p. 316. 
— — T h. M o r t e n s e n. 1903. „Ingolf“ Echinoidea. 1. 
p. 24. PI. X. Figs. 13, 21. 
— — H. L. Clark. 1909. The Cidaridæ. Buil. Mus. 
Comp. Zool. 51. p. 198. PI. 10. 3—4. 
W. B. Ben ham. 1909. Scientific Results of the 
New Zealand Government Trawling Expedition. 
1907. Echinoderma. Records of the Canterbury 
Mus. I. Nr. 2. p 23. 
— H. L. Clark. Report on the Sea-Lilies, Starfishes, 
Brittle-Stars and Sea-Urchins obtained by F. I. S. 
„Endeavour“ on the coasts of Queensland, N. S. 
Wales, Tasmania, Victoria, S. Australia and W. 
Australia. Biol. Res. of the Fishing Experiments 
carried on by F. I. S. „Endeavour“ 1909—14. 
This species has never been adequately described. The char- 
acteristic, widened upper radioles were mentioned by Hutton and 
Ben ham, the pedicellariæ were figured by the present author, 
while Hutton and Clark give some remarks on the characters 
of the test, the latter author giving a pair of figures of a denuded 
test. It is not easy to get a good conception of the species from 
these scattered remarks and I therefore have thought it my duty 
to take this opportunity of supplying the lacking description and 
also to give a pair of figures of the species, in order to show its 
normal appearance. The material at my disposal consists of 4 spec- 
imens, preserved in alcohol, and 4 dried specimens, all apparently 
from the Foveaux Strait between New Zealand and Stewart Island; 
I am indebted for this material to Professor Ben ham, Otago, and 
to Captain Bol lo ns, of the N. Z. G. S. „Hinemoa“. Recently one 
Vidensk. Medd. fra Dansk naturh. Foren. Bd. 73. 10 
